Benchtop Power Supply Buying Guide
What load regulation, ripple, and programmability actually mean for your bench.
Our Top Pick
KORAD KA3005P Programmable DC Power Supply
30 V·5 A·$89
8.4
Prices may change · Free shipping with Prime
Quick Comparison
| Product | Rating | Price | |
|---|---|---|---|
| KORAD KA3005P Programmable DC Power Supply30 V · 5 A | 8.4/10 | $89 | Buy on Amazon |
| Riden RD6018 Programmable Bench Power Supply 60V 18A60 V · 18 A | 8.7/10 | $139 | Buy on Amazon |
Regulated vs unregulated
A regulated supply maintains constant output voltage regardless of load current. Unregulated supplies sag under load — fine for charging, problematic for sensitive circuits. Always buy regulated for bench work.
What is load regulation?
Load regulation is the percentage change in output voltage from no-load to full-load. A 0.01% figure means a 30V supply stays within 3mV across its full current range. Good bench supplies are <0.05%.
Programmable or manual?
Programmable supplies expose SCPI or Modbus control over USB/RS-232/WiFi. Useful for automated testing and repeatable setups. Manual supplies suffice for most hobbyist one-off bench work.
KORAD
KORAD KA3005P Programmable DC Power Supply
8.4
30 V · 5 A · 0.01 % · $89
Riden
Riden RD6018 Programmable Bench Power Supply 60V 18A
8.7
60 V · 18 A · 0.05 % · $139
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