Current limiting protects the circuit, and the ripple figure tells the rest
A bench power supply feeds a circuit under test with a set voltage and, crucially, a set current limit, so that a short or a wrongly wired board draws a controlled amount instead of burning. The voltage and current range is published per channel, and the product of the two is the power it can deliver — a supply quoted at a high voltage and a high current may not give both at once. Channels matter for circuits that need two rails; tracking between them is a published feature. The design divides the shelf: a linear supply is heavier and quieter electrically, a switching supply is lighter and puts more noise on the output, and the figure that describes that noise is ripple, in millivolts, where the maker publishes it. Display resolution — how many digits the voltage and current show — decides how finely a setting can be read, and a stated accuracy sits beside it on the careful listings. Programmability over USB or a network port turns the supply into part of an automated test. Protections — over-voltage, over-current, over-temperature — are listed as present or not. Then the output terminals, whether a remote sense is provided, and the fan noise on a bench. We compare voltage and current range, channels, linear or switching design, ripple, display resolution, programmability and protections.
Switching bench supply · 0–30 V, 0–10 A · coarse and fine encoder · output switch · 18 W USB and Type-C · short-circuit alarm
A 300 W switching supply with coarse and fine encoder adjustment, a short-circuit alarm, and USB-A and Type-C quick-charge ports.
Best for: A user who wants USB-C on a budget.
≈ $50
Switching supply · 0–32 V, 0–10 A · coarse and fine encoder · USB-A and USB-C 20 W · output button · OCP · 115/230 V
A 0–32 V, 10 A supply with coarse and fine encoder control, USB-A and USB-C at 20 W, and an output button, in a compact case.
Best for: A user who needs slightly more voltage.
≈ $50
Switching bench supply · 0–30 V, 0–10 A · 4-digit LED · output switch · 5 V 2 A USB · 300 W
A 300 W switching supply with a 4-digit display, an output on/off switch and a 5 V 2 A USB port, at a low price.
Best for: A buyer who wants the lowest cost.
≈ $43
Switching bench supply · 0–30 V, 0–10 A, 300 W · encoder knob · OCP · 18 W USB · charging mode · 2.3 lb
A popular 300 W switching supply with an encoder knob, an OCP button, an 18 W USB port and an intelligent charging mode, weighing 2.3 pounds.
Best for: A hobbyist building and repairing electronics.
≈ $60
High-voltage switching supply · 0–120 V, 0–3 A · coarse and fine encoder · USB-A and USB-C · 115/230 V
A high-voltage supply for work above 60 V: 0 to 120 V at 3 A, with coarse and fine encoder control and USB ports.
Best for: An experienced user testing high-voltage equipment.
≈ $73
Switching supply · 0–32 V, 0–6 A, 192 W · 4-digit LCD · 3 memories · output switch · 110/220 V
A 192 W supply from a known test brand, with an output switch, 3 memories, 10 mV resolution and low-noise design.
Best for: A lab buyer who prefers a known brand.
≈ $100
Programmable linear supply · 0–30 V, 0–5 A · 1 mV and 1 mA resolution · USB and RS232 · CV and CC · 9 lb
A linear lab supply with 1 mV and 1 mA display resolution, USB and RS232 remote control and software included.
Best for: An audio or RF hobbyist who needs clean output.
≈ $155
Triple-output linear supply · 2 × 32 V, 3.2 A · 2.5/3.3/5 V, 3.2 A · 220 W · series and parallel · timer
A professional triple-output supply with two 32 V, 3.2 A channels, a selectable fixed output, independent, series or parallel modes and a timer.
Best for: An engineer powering mixed-voltage designs.
≈ $459
Programmable supply · 0–30 V, 0–10 A · 2.8-in color LCD · waveform editing · PC software · OVP, OCP, OTP · dual USB
A programmable 300 W supply with a color LCD, 4 memory slots, 10-point waveform editing and PC control.
Best for: An engineer who needs PC control or waveforms.
≈ $116
A 300 W encoder-controlled supply with the most ratings here.
The design is published. It explains ripple, efficiency and thermal behavior all at once.
The noise remaining on the output, published by the manufacturer. It matters on sensitive circuits.
Published channels say how many independent outputs are available. It depends on the circuits being powered.
The read and set step shown, published by the manufacturer. It bounds how finely a setpoint can be chosen.
The ability to store or receive setpoints, published on every listing. It serves repeated testing.
What the manufacturer declares: current limiting, overvoltage cut-off, thermal protection depending on the model.
It is a reading from the appliance. This site publishes its stated resolution and compares no measured value.
The published working voltage and current must cover the intended circuits, with some margin.
Most benches need 30 V and a few amps. Buy a linear supply only for noise-sensitive circuits, and treat anything above about 50 V DC with care.
Four machines in five must publish the value before a column is raised. Below that, it would be comparing absences.
| Model | Price | Output |
|---|---|---|
| NICE-POWER 30V 10A | $43 | 0–30 V, 0–10 A, 300 W |
| Hangell 30V 10A | $50 | 0–30 V, 0–10 A, 300 W |
| Jesverty SPS-3010V | $50 | 0–32 V, 0–10 A |
| Kungber 30V 10A | $60 | 0–30 V, 0–10 A, 300 W |
| Jesverty SPS-12003V | $73 | 0–120 V, 0–3 A |
| UNI-T UTP1306 | $100 | 0–32 V, 0–6 A, 192 W |
| Kiprim DC310S | $116 | 0–30 V, 0–10 A, 300 W |
| KORAD KA3005P | $155 | 0–30 V, 0–5 A, 150 W |
| Siglent SPD3303X-E | $459 | — |
Specifications: manufacturer sheets for maker machines and tools and the matching Amazon product pages. Prices and availability: Keepa. Every figure in this table names its source.
Most recent revision in this category: November 1, 2026.
A price quoted in the text of a MakerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.
