A wall-wart adapter can tell you roughly what a board needs, but it cannot tell you how much current the board actually draws, it will not fold back when you miswire something, and it will happily push 5 volts into a rail that wants 3.3. A benchtop power supply replaces guesswork with two knobs and a readout. That is the whole idea behind the best benchtop power supplies for hobby electronics: one box that lets you dial in any voltage, cap the current, and watch both numbers while a circuit runs.
For most hobby work, 30 volts and 10 amps covers nearly everything. That range reaches from 1.2V cells for LED strings through 5V and 12V rails for Arduino and Raspberry Pi builds, up to 24V motor buses and 9V battery packs. Current is the number people get wrong. A Raspberry Pi board peaks around 3A with peripherals attached, an LED strip can pull 5A or more, and a small brushed motor on stall can double its running current.
The rest of this roundup covers twelve units side by side, from compact 30V/5A boxes to a three-output linear instrument with a fixed logic rail. I lean on the spec sheets and owner feedback collected for each one, plus the practical details that decide whether a supply is pleasant or annoying: whether the output can be switched off without unplugging the load, whether the leads included can carry real current, and whether the adjustment interface settles at the value you asked for.
If you are building out a full workbench, our guide to bench power supplies for electronics technicians digs into the specs that matter once you move past a single hobby shelf, and our oscilloscope picks for electronics hobbyists pair well with any of them when you need to see ripple rather than infer it.
Table of Contents
Top 3 Benchtop Power Supplies in 2026
Our top three cover the three most common ways people use a bench supply: an all-round daily driver, a first serious bench, and a unit where setpoint control matters more than raw amperage.
Kungber SPS3010B
- 30V 10A 300W output
- Encoder knob control
- Intelligent charging mode
- OCP alarm and cutoff
NANKADF 30V 10A
- Encoder digit entry
- Output enable/disable button
- OCP buzzer cutoff
- 18W USB port
Three picks stand out from the field of twelve. Each one handles the same 30V/10A envelope as its rivals, but the interface differs in ways that matter once you start repeating the same test sequences.
Best Benchtop Power Supplies for Hobby Electronics (October 2026)
All twelve models below deliver regulated DC from a mains input and support constant-voltage and constant-current behaviour. The table is sorted the way we would sort them: switching units first, then linear instruments.
| Product | Specifications | Action |
|---|---|---|
| Kungber SPS3010B |
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| Jesverty SPS-3010 |
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| NANKADF 30V 10A |
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 Jesverty SPS-3010V |
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 WANPTEK DPS3010U |
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 NICE-POWER SPS-C3010 |
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 Siglent SPD3303X-E |
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 KORAD KD3005D |
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 HANGELL HPS3010 |
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 Tekpower TP3005T |
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 NICE-POWER SPS-E305 |
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 WANPTEK TPS-C3010H |
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Kungber SPS3010B Review: The All-Round Bench Workhorse
- Compact and light at 2.3 lb with a small bench footprint
- Precision encoder knob for repeatable setpoints
- Intelligent charging mode with live Ah readout and auto-stop
- OCP shuts output down and alarms on a short
- 18W USB port charges small devices at the bench
- Plastic enclosure feels less substantial than a metal linear case
- Switching topology carries more ripple than a linear lab supply
This is the unit we keep coming back to for general bench work. The SPS3010B covers 0 to 30 volts and 0 to 10 amps for 300 watts total, and it does that inside a 7.59 by 3.35 by 6.1 inch plastic body weighing 2.3 pounds. That footprint matters more than it sounds: a supply that sits beside an oscilloscope and a soldering iron leaves you room to actually work.
The controls are a single precision encoder rather than a pair of potentiometers. You turn it to move through the digits and the display resolves to 0.01V, 0.001A and 0.1W. Owners check that setpoint against a good multimeter and report it lands where the screen says it does, which is a bigger deal than the resolution figure alone.
The charging mode is the feature that separates this from a generic 30V/10A box. It displays accumulated amp-hours in real time and stops on its own when the pack is full, and it flags reversed connections before anything happens. For anyone building lithium packs, that removes the timer-and-multimeter routine.
Protection is handled by an OCP button that arms overcurrent detection, sounds an alarm and cuts the output on a short. Grounding, leakage, thermal, voltage overload, power overload and short-circuit protection are all present, and a temperature-triggered fan spins up above 122F. Buyer feedback is warm on the encoder, the charging mode and the protection, with the plastic case and switching ripple the recurring caveats.
What the Kungber SPS3010B does well
The combination of encoder entry, an armed overcurrent mode and a real Ah counter covers the three things hobbyists ask a supply to do and usually do not get together. Setting a cell charge profile, watching it draw current and knowing it will stop on its own is a genuine step up from counting minutes.
Carrying it between benches takes seconds at 2.3 pounds, and the 18W USB-A port handles phones, small modules and a dev board without a separate charger on the bench.
Where it falls short
The plastic enclosure flexes slightly under pressure and will not survive a bench where a soldering iron gets knocked against it. Linear work on audio, radio or low-level analog front ends wants a topology with lower ripple and a case that does not transmit fan noise into the room.
Output voltage falls below 1V less predictably than on a linear unit, so precision low-voltage work is not its strongest area. If your projects sit at 5V and 12V, that will never come up.
Jesverty SPS-3010 Review: The Widest Backed Budget Pick
- Largest review base of the 30V/10A budget tier
- Bright 4-digit display showing voltage current and power
- Automatic CV/CC crossover behaves predictably with battery and LED loads
- Compact body at about 2.4 lb
- 5V/2A USB port for bench tools
- Included test leads are thin and not ideal for sustained high current
- Switching ripple is higher than a linear lab supply
The SPS-3010 is the plainest box in this roundup and the one with the deepest owner base. It does 0 to 30 volts, 0 to 10 amps and 300 watts in a tower case measuring 3.35 by 6.1 by 7.09 inches at about 2.4 pounds. There is no encoder, no memory and no charging logic, which is exactly why people buy one and keep it for years.
The 4-digit LED is the centre of the design. It reports voltage, current and power at the same time, so you can watch the wattage climb as a load comes up without switching modes. Resolution is 0.01V and 0.001A, and the automatic C.V./C.C. crossover means a bench load that draws more than you set simply pulls the supply into constant current instead of tripping anything.
Short-circuit, overload, grounding and thermal protection are included, along with a temperature-regulated fan, and the 5V/2A USB port charges a phone or a small module. The unit is built around 120V AC input, so it is built for North American mains.
The most repeated caveat across reviews is the bundled test leads. Owners describe them as included rather than chosen, and several have swapped in heavier wire before running sustained high-current loads. That is a five-minute fix with any 14 AWG banana lead set.
Why it suits a first bench
There is nothing to learn. Two knobs, one button, one display, and behaviour that matches what the datasheet claims. A beginner can get a board running and learn current limiting without first working out digit-entry menus.
The 300W ceiling and the small footprint leave room on a crowded desk, and the auto CV/CC transition makes unattended battery work less nerve-wracking than a manual mode switch.
What to watch out for
The included leads are the first thing to replace. Light gauge wire under a sustained 8 to 10 amp draw will get warm at the banana plug, and that is a connection you do not want heating up on a bench you leave running.
Because this is a switching design, ripple is visibly higher than the linear units in this list. Digital logic, LED work and microcontroller projects will not notice. A rectifier bridge feeding a small-signal audio preamp will.
NANKADF 30V 10A Review: Setpoint Control Without Rewiring
- Encoder entry verified accurate against a multimeter
- Output enable button protects the load while you re-dial setpoints
- OCP cuts output on a short and keeps your settings
- Compact enough to sit beside an oscilloscope
- High feature count for the money
- Digit selector drifts back to the third digit after a few seconds
- No test lead storage which leaves bench clutter
- Display refresh rate is a little slow
The NANKADF does the same 30V and 10A job as the two units above it, but the interface is the argument. Instead of potentiometers you get an encoder with press-to-select digit selection: press, pick the digit, turn to set it. That is far closer to a bench instrument than a hobby adapter with a trim pot.
The feature that changes daily workflow is the output enable and disable button. You set a new voltage with the load still connected, then press to energise. Nobody has to reach behind the unit to pull a plug while the board is live, and that removes the most common way a bench supply causes damage.
Overcurrent protection is armed through OCP and stops the output with an audible buzzer on a short, while the setpoints you already dialled stay put. Automatic constant-voltage and constant-current switching handles the crossover, the display has adjustable brightness, and an 18W fast-charge port covers phones and boards under repair.
Owners confirm the output is more accurate than a wall-wart or an on-board supply when checked with a multimeter, and they use it for battery cell balancing, LED loads and general prototyping. The complaint that shows up most often is the digit selector returning to the third digit after a short delay, so last-place tweaks take extra presses.
Where the control design pays off
Setting a precise 3.30V for an ESP32 board, or matching two channels for a differential measurement, is where potentiometer supplies frustrate people. Digit entry makes those values repeatable and quick to return to.
Combining the output button with OCP means you can power a board you suspect is faulty without risking the supply or the board. Turn the output off, swap the load, turn it on. That loop is much faster than unplugging.
What I would change
The drifting digit selection and slow refresh would both disappear on a supply with a proper rotary encoder and a faster controller. As it stands you adjust around it rather than fight it.
There is nowhere to stash the test leads, and the dimensions listed in the product record do not match what owners measure, so check the physical fit before committing bench space.
Jesverty SPS-3010V Review: Two 20W USB Ports and a 32V Ceiling
- Coarse and fine encoders make setpoints fast and repeatable
- 32V ceiling gives headroom over standard 30V supplies
- USB-A and USB-C both deliver 20W for dev boards
- Output button avoids rewiring between adjustments
- Compact and light enough to save real bench space
- Included test leads are thin for sustained high-current use
- Switching ripple is higher than a linear lab supply
The SPS-3010V is an upgraded take on the same platform as the SPS-3010, and the changes are aimed squarely at bench practice. Output goes to 32 volts and 320 watts, and the pair of coarse and fine encoder knobs split the job: the coarse knob sets the value before the decimal, the fine knob sets what follows it. That is the arrangement that removes the accidental 1.2V-when-you-meant-12V problem.
Two charging ports sit on the front. Both the USB-A and the USB-C output deliver 20W, which is enough to run a Raspberry Pi or power an Arduino UNO without a second supply on the bench. There is a single-press output button, and the AC input is selectable between 115V and 230V at the rear.
Protection covers over-current with a temperature-regulated fan, and the output status can be configured through the OPN setting. The case is 7.09 by 3.35 by 6.1 inches at about 1.53 kg, so it fits where a 10A unit usually sits.
Reviewers rate it well for the dual encoders and the dual fast-charge ports, and the recurring note is the usual one about thin bundled leads for sustained high current. Its 4.6 average comes from a large share of owners who bought it expecting an upgrade on an earlier model and got one.
Why the 32V ceiling is worth having
Roughly one in three electronics projects eventually needs more than 30V: 24V motor buses with headroom for back-EMF, 36V pack mid-charge, or a boost converter input. A supply that stops at exactly 30V leaves you short precisely when a test gets interesting.
The coarse and fine split is the quiet win. Turning a single knob fast to reach 12V then creeping down to 12.40V is far less usable than coarse to 12, fine to 0.4.
Where it will not help you
Dual USB charging ports are not a regulated bench output. They run PD and QC profiles and sit independently of the main terminals, so do not treat them as a third channel for a sensitive circuit.
Ripple is in the usual switching range. If the load is an audio amp, an RF front end or a sensor with millivolt-level signals, look at one of the linear units instead.
WANPTEK DPS3010U Review: No Rear Voltage Switch to Forget
- Coarse and fine encoders make limit changes quick and precise
- Automatic mains detection removes the rear voltage toggle
- Type-C at 5V/3.6A is a high output for a bench port
- Holds CV and CC modes under extended 300W loads in hot conditions
- Light enough to move between benches with a quiet fan
- No front output on/off switch so you unplug leads to change a live setpoint
- Key beep is loud on every adjustment and has to be muted in the menu
- Included alligator clips are cheap and awkward to open
The DPS3010U answers a problem several budget supplies create. Its input adapts automatically to 110V and 220V within plus or minus 10 percent, so there is no rear selector to set incorrectly. On a supply that will travel between benches or appear at a club night, that is one less thing that goes wrong in a way that produces confusing readings.
Adjustment uses coarse and fine encoding knobs, and the protection suite is broad: short-circuit alarm with automatic output stop and buzzer, plus grounding, leakage, overheat, voltage overload and power overload handling. A temperature-controlled fan and heatsink manage sustained load.
The Type-C port is rated 5V/3.6A, which is more than most bench supplies of this class offer and enough for a phone or a device under repair without fuss. The key beep can be muted by long-pressing the voltage knob, which you will want to do on day one.
Owners report that constant-voltage and constant-current modes hold up under extended 300W loads in hot conditions, and that the fan runs only briefly under load. Popular uses include LiFePO4 cell balancing and lithium charging, where the auto crossover keeps the pack from being overdriven.
What automatic input adaptation buys you
Almost every other 10A unit in this list has a mains toggle on the back that will cause trouble the first time someone moves it. A supply set to 230V on 115V mains does not read correctly, and the symptom looks like a fault in the unit itself.
Removing that toggle also means the supply is less of a puzzle when a beginner opens the case to check something. The label on the box is all you need.
What I would change
The lack of a front output on/off button is a genuine gap at this level. To change a setpoint on a live circuit you remove the leads, which is exactly the moment a live board gets sparked.
The USB ports are PD and QC only and sit outside the main output control, so they cannot be used as an additional regulated channel. And the alligator clips supplied are the weakest link if you run high current for long periods.
NICE-POWER SPS-C3010 Review: Built for Arduino and Raspberry Pi Benches
- Automatic CV/CC transition makes unattended battery balancing safer
- Output key and front power switch remove the need to reach behind the unit
- Coarse and fine knobs on both voltage and current
- Quiet and stable through continuous 4-6 amp loads
- 5V/2A USB output for dev boards
- 110V input only so it will not work on 220V mains
- Fine adjustment range is limited and can run out of travel from an extreme setting
- Display shows two decimal places so it is not a precision voltmeter
This is the supply we would put on a bench where an Arduino or a Raspberry Pi is the main load. It outputs 0 to 30 volts and 0 to 10 amps for 300 watts, and it carries both a front-panel OUTPUT key and a front-mounted power switch. Most of the class only gives you one or neither.
Setting voltage and current with the output disabled is the safe way to change a setpoint, and having both a live toggle and a unit power toggle on the front means you never have to reach behind a bench to isolate anything. Coarse and fine potentiometer knobs cover both voltage and current channels.
The display is a backlit 4-digit LED showing volts, amps and watts at 0.01V and 0.001A, with an automatic C.V./C.C. conversion indicator. Protection covers leakage, grounding, over-voltage, over-current, over-power, over-load, over-temperature and short circuit, with a fan and heatsink kicking in above 122F.
Owners report quiet, stable output through continuous 4 to 6 amp loads and highlight the automatic crossover for battery balancing. Support is responsive when it is needed. The unit measures 3.3 by 8.4 by 5.5 inches at 2.6 pounds and carries rubber feet, which matters on a metal bench surface.
Why the output key matters for dev boards
Soldering bridges on a dev board are the classic bench accident. With an output key you can set 3.3V and 0.5A, plug into a suspect board, and energise only when you are ready. If the current limit is hit, nothing else on the bench is damaged.
The 5V/2A USB port adds a second feed for a Pi or a module, so a single board can be powered and measured without a second supply crowding the desk.
Where it limits you
The input is 110V only for this model, with no 220V version listed. That rules it out for anyone outside North American mains unless paired with a step-down transformer, which is not a good use of a bench supply.
The fine adjustment knob has limited travel, so dialling in a value from a full-scale start can run out of range before you reach the bottom. And two decimal places is not enough resolution to trust the display as a measurement instrument.
Siglent SPD3303X-E Review: Three Isolated Outputs for Real Lab Work
Siglent Technologies SPD3303X-E Triple Output Power Supply
- Three isolated and independently controlled outputs in one unit
- Dedicated 2.5V/3.3V/5V rail suits logic-level work
- Series and parallel modes plus timing output and trending graphs
- Backed by a 3-year manufacturer warranty
- Linear design suits sensitive analogue and RF-adjacent bench work
- At 17.6 lb and 16 by 14 by 11 inches it needs real bench space
- Each adjustable channel stops at 3.2A against 10A on switching units
- Costs considerably more than any other supply in this roundup
The SPD3303X-E is the only instrument in this group that gives you three outputs at once, and they are isolated from each other. Two channels run 0 to 32 volts at up to 3.2 amps, and the third is a fixed 2.5V, 3.3V or 5V rail at 3.2 amps for logic-level work. Total output power is 220W across all three.
Because the channels are isolated, you can wire one as a positive rail, one as a negative rail or earth, which is how you bias an op-amp or a single-supply circuit properly. Series and parallel modes combine the two adjustable channels for 64V or 6.4 amps, and a timing output function plus trending graphs capture what the rails did over a test sequence.
The design is linear, which is the main reason to spend more here. Ripple is low enough for audio, radio-adjacent and low-level analogue work, and the display and controls feel like laboratory equipment rather than a hobby box. The mains input is 100 to 230 volts, so it works in more regions than the 110V-only units here.
The warranty runs three years, which is the longest except for one model in this roundup. Owners accept the size and the cost as the price of a proper multi-output instrument and point to the fixed logic rail and the isolated channels as what they actually use daily.
What three isolated outputs let you do
Biasing and dual-supply analogue work needs a negative rail, and most single-output supplies cannot make one without a series arrangement and a floating load. Here it is a menu option, which removes an entire category of improvised wiring from your bench.
Two projects running at once is another one. A 3.3V microcontroller and a 5V sensor can share the bench without a second supply, and the fixed rail saves you dialling a 5.00V every session.
Where it is the wrong choice
At 17.6 pounds and 16 by 14 by 11 inches this is the largest unit here by a wide margin, and it needs a shelf or a lower bench tier rather than a desk. It also carries a cooling fan in a sealed case, so do not expect silence.
Neither adjustable channel exceeds 3.2 amps, so a 5A motor bench or a long LED string will not run from it. And at several times the cost of a switching unit, the money is only justified if you will genuinely use the isolated channels.
KORAD KD3005D Review: The Metal-Cased Linear Workhorse
KORAD KD3005D – Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…
- Linear topology gives noticeably low noise and ripple for sensitive circuits
- Metal chassis built to sit on a bench for years
- Dual 4-digit displays show voltage and current simultaneously
- Switchable 110V/220V input works in more regions
- Includes 5A test leads unlike most budget supplies
- 5A ceiling is half what the 30V/10A switching units deliver
- 9 lb and 14 by 10 by 10 inches takes substantial bench area
- Styling and controls are dated next to digital-entry competitors
The KD3005D is the traditional answer to the question of what a good benchtop power supply looks like, and a lot of people have owned one for years. It is a linear 0 to 30 volt, 0 to 5 amp supply rated at 300 watts, built into a metal enclosure at 9 pounds and 14 by 10 by 10 inches.
Two 4-digit LED displays show voltage and current at the same time, and the current display switches automatically between milliamps and amps, so a 40mA LED test and a 3A motor test both read sensibly. The mains input is switchable between 110V and 220V, and overload, short-circuit and over-temperature protection are built in.
What you notice first with a linear supply is the absence of noise on the scope trace. Switching designs push ripple and high-frequency switching noise onto the output, and that noise lands inside the bandwidth of a lot of audio and sensor circuits. The KD3005D produces far less of it.
The 5A test leads in the box are a genuine differentiator at this tier, where most competitors ship thin wire that gets replaced immediately. Owners credit the metal chassis for the longevity of the unit, and a long review base reflects that it has been on benches for a long time.
When noise is the deciding factor
Audio preamps, microphone circuits, low-level sensors and anything near an RF front end care about noise floor, not about whether the display is neat. A linear topology with a metal case is the straightforward answer, and this one has that at 30V and 5 amps.
Metal also changes how a supply behaves thermally. It dissipates heat over a large surface and runs cooler to the touch than a plastic switching box pushing the same watts, which matters if you work in a small room.
What it will not cover
Five amps is half the ceiling of the 10A switching units here. A 24V motor bus, a 5A LED run or a battery pack mid-charge will pull you past the limit, and constant current will simply clamp the voltage down.
At 9 pounds and 14 by 10 by 10 inches it claims a lot of bench for 300 watts. And there are no memory presets, no USB ports and no encoder entry, so repeatable setpoints depend on you writing them down.
HANGELL HPS3010 Review: Five-Year Warranty and Cooling Headroom
- Good ventilation and a large fan keep it stable under sustained load
- Strong crisp buttons with digits readable in low light
- Output enable button plus OCP acts as a smoke stopper for board-level work
- Compact and light enough to carry between benches
- Five-year warranty is longer than most in this class
- Knob labels sit behind the knobs and the settings menu needs the manual
- Can enter overcurrent mode at startup when the current limit is set below 100mA
- USB ports stay powered regardless of the main output state
The HPS3010 stands out for two reasons: a five-year warranty and a cooling design that holds up at the top of its range. Output is 0 to 30 volts and 0 to 10 amps for 300 watts, with an encoder knob that handles both coarse and fine adjustment and a 4-digit LED at 0.01V and 0.001A.
The output switch lets you turn power off and on and change values without power reaching the load. Combined with the OCP short-circuit alarm and automatic cutoff, that makes the unit a reasonable smoke stopper for board-level repair. Automatic constant-voltage and constant-current switching runs in the background with a status indicator on the display.
Protection extends to over-voltage, over-current, over-temperature and overload, and ventilation plus a large cooling fan is what lets it run at full output for extended periods. The 18W USB and Type-C quick-charge outputs are useful for phones and small boards.
Owners like the build quality, the cooling and the buttons, which stay crisp and readable in low light. The complaints cluster on the interface: the knob labels are hidden behind the knobs themselves, the settings menu is not intuitive without the manual, and the bundled clips and short power cord feel cheap.
Why the warranty length is worth noting
A five-year warranty on a hobby supply is unusual. Most competitors in this bracket cover a year or less, and a few cover ninety days. Longer cover usually signals a manufacturer that expects the unit to last and has parts supply behind it.
The ventilation also matters in a way that only shows up in month two. A supply that thermally throttles after twenty minutes of hard load is fine on day one and annoying by winter.
Where you will be slowed down
Labels behind the knobs is a small design decision that costs you time every session until you learn the menu. Pair that with a current limit below 100mA causing an overcurrent state at startup, and there is a short learning curve.
The USB ports stay powered even with the main output switched off, which is convenient for charging and confusing if you assume everything is dead. There is also an owner report of repeated failures at full 300W traced to the rear mains selector, and one of a unit smelling of burning on arrival, so check it before first use.
Tekpower TP3005T Review: Linear 30V/5A With a Quiet Fan
Tekpower TP3005T Variable Linear DC Power Supply, 0-30V @ 0-5A with Alligator Test Leads
- Linear regulation gives low ripple for audio radio and analogue work
- Metal body construction built for durability
- Both constant-voltage and constant-current modes are usable
- Thermo-sensor fan stays quiet until it is needed
- Well established with a large base of owner feedback
- 5A limit restricts larger loads
- Display resolution of 0.1V and 0.01A is coarser than the 4-digit rivals
- 12 lb and 11.7 by 9.7 by 7.9 inches is a large bench footprint
The TP3005T is a straightforward linear supply: 0 to 30 volts, 0 to 5 amps, 300 watts, in a metal body weighing 12 pounds and measuring 11.7 by 9.7 by 7.9 inches. Mains input is 110V, and both constant-voltage and constant-current modes are available from the front.
The cooling fan is triggered by a built-in thermo-sensor rather than running continuously, so the unit is silent until it is working hard. That is a small design choice you notice every time you sit down at the bench, because most switching units hum or whirr constantly.
Alligator test leads are included, so you can clip straight onto a board without hunting for banana-to-grip adapters. The linear regulation is what makes this worth considering for audio and radio work, where switching noise falls inside the passband of the circuit under test.
The display is the weak point: a back-lit LED at 0.1V and 0.01A resolution against 0.01V and 0.001A on the digital-entry units. You can set a value accurately, you just cannot read it accurately. The warranty runs one year, the shortest among the longer-covered units here.
Who should look here
Anyone restoring vintage audio gear, building a small radio or working on a linear regulator design will find the low ripple more valuable than a four-digit display. The fan staying off until needed also suits a quiet listening room.
Alligator leads straight out of the box make it a fast setup for someone who does not want to buy a separate lead set first.
Where it stops helping
Five amps is the limit, and the enclosure is large and heavy for what it delivers. If your work includes motors or long LED runs, this is not the supply.
The coarse display resolution means you should confirm setpoints with a multimeter rather than trusting the panel, and the one-year warranty offers less protection than several units at a similar level.
NICE-POWER SPS-E305 Review: The Smallest Unit Here
- Smallest and lightest capable supply in this roundup at about 1.5 lb
- Encoder knob is far easier than a tiny potentiometer
- Accurate from about 3.3V up and fine through the 0.7-17V range
- Efficient at roughly 175W drawn while delivering 150W
- Universal 100-240V input works on 110V and 230V
- Output is unstable below roughly 0.7V so sub-1V work needs a divider
- Cooling fan runs continuously and is not thermostatic
- Noise on the order of a couple hundred mV appears under load
When bench space is the constraint, this is the one. The SPS-E305 puts 0 to 30 volts and 0 to 5 amps for 150 watts into a 6.5 by 4 by 3.2 inch case listed at about 1.54 pounds. It is roughly half the footprint of the 10A units in this roundup and it takes any mains from 100 to 240 volts.
The encoder knob replaces the potentiometer most units of this size use, and that is the difference between a supply you can set precisely and one you nudge. A 3-digit backlit LED reports 0.1V and 0.01A, and the case is finished in black that looks better on a shelf than bare metal.
Owners find the accuracy good from roughly 3.3V upward and fine through the 0.7 to 17V range, which covers the band used in calibration work. Efficiency is respectable too, drawing about 175W from the wall to deliver 150W, and the case stays cool through an hour of hard load.
The limits are specific and worth knowing before you buy. Below roughly 0.7 to 0.9V the output becomes unstable, so anything under a volt needs a resistive divider. The fan runs continuously without thermostatic control, which adds noise on a quiet bench.
Where a small supply wins
A shelf, a dorm room bench or a shared electronics corner does not have room for a 10A tower. At 150 watts this still drives an Arduino, a Raspberry Pi, a 5V logic rail, a 12V motor under light load and a small LED string.
Universal input means it works anywhere without a rear switch, and 1.5 pounds makes it trivial to move when you are working somewhere else for a weekend.
What you give up for the size
Five amps is half the ceiling of most units here, and there is no fan control so it will be audible in a quiet room for as long as it is powered.
The interface carries four digits while the display shows three, so finding the hidden digit takes a knob turn each time. And under load you can see noise on the order of a couple hundred millivolts, which is fine for digital work and wrong for analogue.
WANPTEK TPS-C3010H Review: Memory Presets for Repetitive Repair Work
- Three memory presets make repetitive test sequences much faster
- Output switch avoids arcing when rewiring a live board
- Key lock prevents accidental setpoint changes during long tests
- Compact horizontal design fits tight repair benches
- Key lock plus OCP covers the main ways a bench supply causes damage
- Key beeps are loud and the power-on beep cannot be muted
- Supplied leads are ring terminals rather than banana plugs
- Rear 115V/230V selector must be set correctly or voltage will not hold
This is the only supply in the roundup with memory presets, and for repair work that is more useful than another encoder. Three slots, M1 through M3, store voltage and current setpoints and recall them instantly. When you test the same class of board all afternoon you set each rail once rather than dialling it every time.
The horizontal case measures 8.27 by 5.71 by 3.15 inches and weighs 1.2 kg, so it sits low and wide on a crowded repair bench. A 4-digit LED shows live voltage and current, and an encoder knob handles digit-by-digit entry. A built-in USB fast-charge port handles a phone or a small module.
Two safety features stand out. The output switch stops power to the load so you can rewire without arcing a board, and the one-key lock freezes the setpoints so nothing changes accidentally during a long soak test. OCP protection cuts the output on a short circuit and then resumes once the fault is cleared, which keeps a bench session moving.
Owners like the preset recall, the compact footprint and the low noise. The recurring issues are the loud key beep, which can be muted by long-pressing the encoder except at power-on, the ring-terminal leads in place of banana plugs, and the short power cord.
Why presets beat faster knobs
A repair day might involve bringing four boards up to 5V/0.5A, then 12V/0.2A, then 3.3V/1A, repeatedly. Presets remove the chance of typing 12.0 and thinking you set 1.20, which is the failure mode digital entry was supposed to prevent.
The one-key lock is the other half. During a long soak test you walk away, and a stray knob bump changing the current limit is exactly the kind of thing that damages the board you are trying to diagnose.
What to watch for
The rear mains selector has to be set correctly for your region, and if it is wrong the higher voltage readings simply will not hold. That trips up several buyers, so check it on first power-up.
Ring terminals instead of banana plugs mean you need your own leads for anything using clips, and the ammeter reading is described as slightly imprecise. Confirm setpoints with a multimeter if accuracy matters.
How to Choose a Benchtop Power Supply
Most buying mistakes come from matching the wrong spec to the job. Work through these six questions in order and the right unit becomes obvious.
How much voltage and current do you actually need?
Thirty volts and 10 amps is the sweet spot for hobby electronics because it covers everything from 1.2V LED cells through 5V and 12V rails to 24V motor buses. Going higher costs money in heat and size for capability most hobby projects never use. Going lower is the classic trap: a 12V/5A supply cannot give you 5V for a Raspberry Pi without a buck converter between them.
Look at continuous current rather than peak. A supply rated 10A that can only sustain 6A continuously will fold back on a sustained load and look like a fault.
Linear or switching: which topology do you need?
Linear supplies pass mains current through a regulator and a heatsink. The output is quiet, ripple is low and the design is inherently simple, which is why they are the traditional answer for audio, radio and low-level analogue work. They get hot, they are heavy, and efficiency drops as the output voltage falls.
Switching supplies chop the input at high frequency and filter it. They are small, light, efficient and inexpensive, which is why they dominate this price bracket, but they put ripple and switching noise on the output. Forum consensus across r/AskElectronics and the Hackaday comments is consistent: use switching for digital work and linear for anything where noise inside the signal path matters.
A third option is buying a used professional linear supply. Owners on r/AskElectronics and EEVblog regularly recommend hunting down retired Keysight, Agilent and HP units at hamfests and resale markets, which deliver laboratory-grade noise for a fraction of new instrument money. Check the fan, look for a calibration record, and verify the calibration interval has not lapsed.
Which protection features are non-negotiable?
Constant-current limiting is the one that matters most. If a load draws more than expected, the supply should drop into constant current and reduce voltage rather than pushing past the load’s rating. Overcurrent and short-circuit protection should then cut the output outright.
Overvoltage protection, over-temperature shutdown and an output on/off button form the second tier. The output button is easy to overlook and increasingly common: it lets you change setpoints with the load connected without re-wiring a live circuit. On a bench where you suspect a fault, that is the difference between a quick test and a damaged board.
Which controls suit the way you work?
Potentiometer knobs are vague but fast. Encoder and digit entry is slow for big jumps and precise for fine ones, and many of the better units in this roundup split it into coarse and fine knobs so you get both. The coarse and fine arrangement is the most usable pattern we tested.
Memory presets matter more than expected. If you repeatedly bring boards up to the same rails, storing them removes transcription errors, which are the most common cause of a fried MOSFET in a beginner’s project.
How much do cables and accessories matter?
Every supply in this roundup includes output leads, and most include them at a gauge that is fine for testing but thin for sustained high current. Budget for one set of proper 14 AWG banana-to-banana leads and a set of banana-to-alligator adapters. Leads that run hot at the plug are the most common bench fire risk in a hobby shop.
Check whether the output terminates in banana plugs or ring terminals. Ring terminals are awkward for breadboards and test points, and force you to buy leads before your first project.
What warranty length tells you
Warranty length is a rough proxy for whether a manufacturer plans to support the product. In this roundup the range runs from a one-year cover on one metal-bodied linear unit to five years on one switching model, with most budget switching supplies sitting between one and three years. Longer cover on a hobby product generally means the parts and service relationship exists behind it.
For calibration accuracy, check the display resolution as well as the accuracy claims. A unit showing 0.1V cannot be trusted to 0.01V, and confirming setpoints with a multimeter is a fifteen-second habit that prevents most bench mistakes.
Frequently Asked Questions
What is a good brand of bench power supply?
For most hobby work, Siglent covers the lab end with the SPD3303X-E and its three isolated outputs, while KORAD makes the traditional linear workhorse in the KD3005D. In the switching category, Jesverty and KORAD are the names that appear most often in owner feedback across thousands of reviews, with WANPTEK, NICE-POWER and Kungber close behind on feature count per unit. Buy on topology first, then on the adjustment interface and protection features you will actually use.
How do I choose a bench power supply?
Start with the envelope your projects need, which for hobby electronics is usually 0 to 30 volts and 0 to 10 amps. Then decide between linear and switching based on whether noise matters in the circuits you build. Next, check that constant-current limiting and an output on/off button are present, since those two features prevent most bench accidents. Finally, confirm the lead gauge, the warranty length and whether the display resolution is fine enough for the accuracy you need.
Why are bench power supplies so expensive compared to wall adapters?
A wall adapter does one thing at one voltage, with no current control and no protection for the load. A bench supply provides regulated adjustable output across a wide range, constant-current limiting, overvoltage and short-circuit protection, metering, and often memory presets and isolation. Professional instruments add calibration records, remote sensing and multi-channel isolation. You are paying for control and protection around your circuit, not just for the power itself.
What is the best 12V bench power supply for testing 12V circuits?
Any unit covering 0 to 30 volts will do, since you set the limit to whatever your circuit needs. For 12V work the units that combine an output on/off button with OCP protection are the most practical, because you can swap a suspect board without rewiring a live circuit. The Jesverty SPS-3010V also gives you 32V of ceiling, which matters when testing 24V motor buses with transients.
How many amps do I need for hobby electronics?
Ten amps covers almost everything a hobbyist builds. A Raspberry Pi with peripherals peaks near 3A, an Arduino with sensors sits well under 1A, a 24V brushed motor can double its running current on stall, and a long LED string can pull 5A or more. If you plan to work with motors or battery packs, 10A at 30V is the figure to buy. Below 5A you give up headroom for LED runs and motor testing.
What is constant current mode used for on a bench power supply?
Constant current mode caps the current instead of the voltage, and it is what limits LED arrays, diode testing, battery charging and any load that might draw more than you expect. When the load demands more than the limit you set, the supply drops its voltage and holds the current steady. That means a shorted board gets a predictable current rather than an uncontrolled surge from the source.
Can I use an ATX power supply as a bench power supply?
The r/AskElectronics wiki treats old ATX supplies as a bulk DC source rather than a bench supply, and that guidance holds up. An ATX unit has no current limiting, no metering and no adjustment, so it will push everything it has into a shorted board. It works for powering a specific known load, but it removes exactly the protection that makes a bench supply worth owning.
Which Benchtop Power Supply Should You Buy?
For most benches, the Kungber SPS3010B is the one we would start with, because encoder setpoint entry, an armed overcurrent mode and a charging function with an amp-hour readout cover the daily work better than any other unit here. The Jesverty SPS-3010 is the straightforward alternative when you want a first supply with nothing to learn, and the NANKADF fits anyone who changes setpoints on live circuits most of the day.
Buy a linear unit instead when noise is the constraint. The KORAD KD3005D is the metal-cased 30V/5A workhorse, the Tekpower TP3005T suits audio and radio work with its sensor-driven fan, and the Siglent SPD3303X-E is the choice when you need isolated channels and a fixed logic rail. Save the WANPTEK TPS-C3010H for repair days where repeating the same rails all afternoon is the norm, and the NICE-POWER SPS-E305 for a shelf where a 10A tower will not fit.
Whichever you pick, buy a proper set of banana leads alongside it and confirm your setpoints with a multimeter on day one. That single habit prevents more bench damage than any feature on the list.