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A bench power supply gives adjustable DC voltage and current limiting for electronics work.

Electrical work can be dangerous. Always follow the instructions, use the right safety rating for the job and call a licensed electrician if you are unsure.

This guide is built from Amazon product listings, not our own testing, so confirm specs, safety ratings and current price on each product page.

Prices are approximate US dollar conversions of what Amazon showed on October 31, 2026.

Last updated: October 31, 2026.

Quick Picks

Product Type Best for
DC Power Supply Variable 0-30V 0-10A Bench power supply Adjustable switching supply
DC Power Supply with Encoder Knob Bench power supply Encoder adjustment knob
DC Power Supply Variable 0-30V 0-10A (Alt.) Bench power supply Switching regulated bench supply
DC Power Supply 0-32V 0-10A (20W USB) Bench power supply Includes USB output
DC Power Supply 0-60V 0-5A Bench power supply Higher voltage
DC Power Supply 0-32V 0-10A Switching Bench power supply Switching bench supply

Our Picks

1. DC Power Supply Variable 0-30V 0-10A

A variable DC power supply, 0 to 30V and 0 to 10A, adjustable switching regulated bench type, per the listing. It was shown at about $43 on Amazon.com on October 31, 2026.

Good for: Adjustable switching supply. Watch out: lesser-known brand.

Check on Amazon

2. DC Power Supply with Encoder Knob

A variable DC bench power supply with encoder adjustment knob, per the listing. It was shown at about $47 on Amazon.com on October 31, 2026.

Good for: Encoder adjustment knob. Watch out: lesser-known brand.

Check on Amazon

3. DC Power Supply Variable 0-30V 0-10A (Alt.)

A variable 0 to 30V 0 to 10A adjustable switching regulated bench power supply, per the listing. It was shown at about $47 on Amazon.com on October 31, 2026.

Good for: Switching regulated bench supply. Watch out: lesser-known brand.

Check on Amazon

4. DC Power Supply 0-32V 0-10A (20W USB)

A DC power supply variable, 0 to 32V and 0 to 10A bench supply with USB charging, per the listing. It was shown at about $50 on Amazon.com on October 31, 2026.

Good for: Includes USB output. Watch out: lesser-known brand.

Check on Amazon

5. DC Power Supply 0-60V 0-5A

A variable DC power supply, 0 to 60V and 0 to 5A, per the listing. It was shown at about $52 on Amazon.com on October 31, 2026.

Good for: Higher voltage. Watch out: lower current.

Check on Amazon

6. DC Power Supply 0-32V 0-10A Switching

A DC power supply variable, 0 to 32V and 0 to 10A switching bench power supply, per the listing. It was shown at about $53 on Amazon.com on October 31, 2026.

Good for: Switching bench supply. Watch out: lesser-known brand.

Check on Amazon

How to Choose

Voltage and current

Choose the range you need.

Current limit

Protects circuits.

Noise

Switching supplies can be noisier than linear.

Frequently Asked Questions

Switching or linear?

Switching is lighter; linear is quieter.

Cheapest?

The 0-30V 10A.

Higher voltage?

The 0-60V 5A.

Bottom Line

For general use, a 0-30V 10A supply. For higher voltage, the 0-60V 5A.

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