Korad KA3005P
#9 in Single outputFull review
A low-cost programmable linear supply for hobby and repair benches that want PC control on a budget.
Amazon $155$155
The Korad KA3005P rates 3.0 among single output bench power supplys; the Tekpower TP3003D-3 rates 2.5 among multi-output ones. The Korad KA3005P costs $24.99 less ($155 vs $179.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Tekpower TP3003D-3
#7 in Multi-outputFull review
The cheapest way to get three linear rails on a hobby bench, if PC control is not needed.
Amazon $179.99$179.99
Scores side by side
These two sit in different type classes (single output and multi-output), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Korad KA3005P | Tekpower TP3003D-3 |
|---|---|---|
| Overall rating | 3.0/5 | 2.5/5 |
| Value 25% | 45 $1.03 per watt ($155, 150 W from the channel ratings) | 48 $0.92 per watt ($179.99, 195 W from the channel ratings) |
| Output quality 20% | 55 2 mVrms ripple and noise | 71 1 mVrms ripple and noise |
| Resolution 15% | 50 10 mV / 1 mA setting resolution | 0 100 mV / 10 mA readback resolution |
| PC control 15% | 50 USB, RS232 | 0 no PC interface |
| Protection & features 10% | 60 over-voltage protection, over-current protection | 30 over-current protection |
| Warranty 15% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| Korad KA3005P | Tekpower TP3003D-3 | |
|---|---|---|
| Output | ||
| Type | Power supply | Power supply |
| Regulation | Linear | Linear |
| Channels | 1 | 3 |
| Channel ratings | 30 V/5 A | 30 V/3 A, 30 V/3 A, 5 V/3 A |
| Max voltage | 30 V | 30 V |
| Max current | 5 A | 3 A |
| Rated power | 150 W (channels added) | 195 W (channels added) |
| Ripple and noise | 2 mVrms | 1 mVrms / 20 mVp-p |
| Precision | ||
| Setting resolution | 10 mV / 1 mA | - |
| Readback resolution | 10 mV / 1 mA | 100 mV / 10 mA |
| Control | ||
| PC interfaces | USB, RS232 | None |
| Over-voltage protection | Yes | - |
| Over-current protection | Yes | Yes |
| Build | ||
| Weight | 10.6 lb | 28 lb |
| Warranty | - | 1 year |