SPD3303C — Triple-output Programmable Linear DC Power Supply
Programmable linear bench power supply with three independent outputs: two adjustable 0–32 V / 0–3.2 A channels and one selectable 2.5 V / 3.3 V / 5.0 V output at 3.2 A. It supports independent, series and parallel modes, 220 W total power, USB Device remote control, SCPI commands and EasyPower PC utility.
| Model | Outputs | CH1 & CH2 | CH3 | Resolution | Interface |
|---|---|---|---|---|---|
| SPD3303C | 3 independent | 0–32 V / 0–3.2 A each | 2.5 / 3.3 / 5.0 V · 3.2 A | 10 mV / 10 mA | USB Device · SCPI · EasyPower |
Key Features
Three Independent Outputs
Two adjustable 0–32 V / 0–3.2 A channels and one selectable 2.5 V / 3.3 V / 5.0 V output allow analog rails and logic rails to be powered from one bench instrument.
Independent, Series and Parallel Modes
Use CH1 and CH2 separately, combine them in series for higher voltage, or combine them in parallel for higher current while keeping the third fixed output available.
10 mV / 10 mA Resolution
The LED-display interface provides 4-digit voltage and 3-digit current readout with 10 mV and 10 mA minimum setting/readback resolution.
USB Remote Control with SCPI
USB Device connectivity supports PC control, EasyPower PC utility and SCPI commands for simple automated bench and education-lab workflows.
Save/Recall for Repeat Setups
Five groups of local setup storage help users recall common lab configurations quickly instead of manually resetting every channel.
Protection and Cooling
Short-circuit protection, overload protection and a smart temperature-controlled fan make it suitable for teaching labs, service benches and prototype debugging.
Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| OUTPUTS | ||
| CH1 / CH2 | V / A | 0–32 V / 0–3.2 A each |
| CH3 | V / A | 2.5 V / 3.3 V / 5.0 V selectable · 3.2 A |
| Total power | W | 220 |
| DISPLAY AND RESOLUTION | ||
| Display | — | LED display · 4-digit voltage · 3-digit current |
| Minimum resolution | — | 10 mV / 10 mA |
| Setting accuracy | — | Voltage ±(0.5% of reading + 3 digits); Current ±(0.5% of reading + 3 digits) |
| Readback accuracy | — | Voltage ±(0.5% of reading + 3 digits); Current ±(0.5% of reading + 3 digits) |
| OPERATING MODES | ||
| Output modes | — | Independent · Series · Parallel |
| Protection | — | Short-circuit and overload protection |
| INTERFACE AND STORAGE | ||
| Remote control | — | USB Device · SCPI · EasyPower PC utility |
| Save / Recall | — | 5 local setup groups; external memory expansion support |
| Input mains | — | 100 / 120 / 220 / 230 V compatible design |
Applications
Teaching Lab Power Supply
Cost-effective triple-output supply for analog electronics, embedded systems and instrumentation training.
Embedded Prototype Debug
Power analog rails, microcontroller logic and sensor boards from one instrument during PCB bring-up.
Repair and Service Bench
Front-panel controlled supply for electronics repair, diagnostics and functional checks.
Simple Automated Power Test
USB Device and SCPI support make it usable in basic PC-controlled power-up and verification sequences.
Analog and Mixed-signal Circuits
Independent rails support op-amp, ADC/DAC, motor-control and mixed-signal prototype testing.
Low-power Converter Testing
Use adjustable voltage/current limits for small DC-DC converter, charger and protection-circuit checks.
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