OWON SPE6103
#3 in Single outputFull review
A compact, programmable 60 V switching supply that gives a lot of range for the money on a crowded bench.
Amazon $139.99$139.99
The OWON SPE6103 and the OWON SPE3051 are evenly matched, rated 3.3 and 3.2. The OWON SPE6103 leads on value. The OWON SPE3051 wins on output quality. The OWON SPE3051 costs $20 less ($119.99 vs $139.99).
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.
OWON SPE3051
#4 in Single outputFull review
A small programmable 30 V, 5 A supply for electronics hobbyists who want PC control in a compact box.
Amazon $119.99$119.99
Which should you buy?
- Choose the OWON SPE6103 for value ($0.47 per watt ($139.99, 300 W rated) vs $0.80 per watt ($119.99, 150 W rated)).
- Choose the OWON SPE3051 for output quality (3 mVrms ripple and noise vs 5 mVrms ripple and noise).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every single output bench power supply; a clear win is highlighted. How we rank explains each one.
| Factor weight | OWON SPE6103 | OWON SPE3051 |
|---|---|---|
| Overall rating | 3.3/5 | 3.2/5 |
| Value 25% | 68 $0.47 per watt ($139.99, 300 W rated) | 52 $0.80 per watt ($119.99, 150 W rated) |
| Output quality 20% | 33 5 mVrms ripple and noise | 45 3 mVrms ripple and noise |
| Resolution 15% | 50 10 mV / 1 mA setting resolution | 50 10 mV / 1 mA setting resolution |
| PC control 15% | 80 USB with SCPI | 80 USB with SCPI |
| Protection & features 10% | 80 over-voltage protection, over-current protection, stored setups | 80 over-voltage protection, over-current protection, stored setups |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| OWON SPE6103 | OWON SPE3051 | |
|---|---|---|
| Output | ||
| Type | Power supply | Power supply |
| Regulation | Switching | Switching |
| Channels | 1 | 1 |
| Channel ratings | 60 V/10 A | 30 V/5 A |
| Max voltage | 60 V | 30 V |
| Max current | 10 A | 5 A |
| Rated power | 300 W | 150 W |
| Ripple and noise | 5 mVrms / 50 mVp-p | 3 mVrms / 30 mVp-p |
| Precision | ||
| Setting resolution | 10 mV / 1 mA | 10 mV / 1 mA |
| Readback resolution | 10 mV / 1 mA | 10 mV / 1 mA |
| Control | ||
| PC interfaces | USB | USB |
| SCPI | Yes | Yes |
| Stored setups | 4 | 4 |
| Over-voltage protection | Yes | Yes |
| Over-current protection | Yes | Yes |
| Build | ||
| Weight | 3.3 lb | 3.3 lb |