Siglent SPD3303C
#5 in Multi-outputFull review
The lower-cost triple-output Siglent, for benches that want three linear rails and USB control.
Amazon $344$344
32 V / 3.2 A220 W3
2.5/5
The cheapest way to get three linear rails on a hobby bench, if PC control is not needed.
- 30 V / 3 AOutput
- 195 W (channels added)Power
- LinearType
- NonePC control
Check price at Amazon$179.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Three linear outputs for under $180
- Series and parallel modes on the 30 V channels
- One-year warranty
Cons
- No PC connection
- Very heavy at 28 lb
- Coarse 0.1 V meters
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | TP3003D-3 |
|---|---|
| Output | |
| Type | Power supply |
| Regulation | Linear |
| Channels | 3 |
| Channel ratings | 30 V/3 A, 30 V/3 A, 5 V/3 A |
| Max voltage | 30 V |
| Max current | 3 A |
| Rated power | 195 W (channels added) |
| Ripple and noise | 1 mVrms / 20 mVp-p |
| Precision | |
| Readback resolution | 100 mV / 10 mA |
| Control | |
| PC interfaces | None |
| Over-current protection | Yes |
| Build | |
| Weight | 28 lb |
| Warranty | 1 year |
Alternatives in this type
NICE-POWER SPS3010-2KD Dual 30V 10A
#6 in Multi-outputFull review
A cheap dual switcher for projects that need two high-current rails, or 60 V or 20 A from one box.
Amazon $199.99$199.99
30 V / 10 A600 W2
GW Instek GPD-3303D
#8 in Multi-outputFull review
A triple-output linear supply from a lab brand, outclassed here on price and setting resolution.
Amazon $719$719
30 V / 3 A195 W3
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