A cheap dual switcher for projects that need two high-current rails, or 60 V or 20 A from one box.
Amazon $199.99
A triple-output linear supply from a lab brand, outclassed here on price and setting resolution.
- 30 V / 3 AOutput
- 195 WPower
- LinearType
- USBPC control
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
- Three linear outputs with tracking series and parallel modes
- USB control
- Four stored setups
- Coarse 0.1 V setting steps
- Expensive next to the Rigol and Siglent triples
- No published warranty
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 | GPD-3303D |
|---|---|
| Output | |
| Type | Power supply |
| Regulation | Linear |
| Channels | 3 |
| Channel ratings | 30 V/3 A, 30 V/3 A, 2.5/3.3/5 V/3 A |
| Max voltage | 30 V |
| Max current | 3 A |
| Rated power | 195 W |
| Ripple and noise | 1 mVrms |
| Precision | |
| Setting resolution | 100 mV / 10 mA |
| Readback resolution | 100 mV / 10 mA |
| Control | |
| PC interfaces | USB |
| Stored setups | 4 |
| Build | |
| Weight | 15.4 lb |
Alternatives in this type
The cheapest way to get three linear rails on a hobby bench, if PC control is not needed.
Amazon $179.99A basic bench supply with fixed logic rails, for classrooms and service benches that do not need PC control.
Amazon $369.53Compare
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