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The Siglent SPD3000X Series is a linear programmable DC power supply built around a 4.3 inch true color TFT-LCD display, with support for programmability and a real-time wave display. It provides three isolated outputs: two adjustable channels and one selectable channel offering 2.5V, 3.3V, or 5V. Output short-circuit and overload protection are built in.
The series is suited to use in production and development, where its three independent outputs and programmable control let an engineer drive multiple rails from a single bench instrument.
ValueTronics stocks and holds its own inventory in a 20,000 square foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois.
The SPD3000X Series comprises the SPD3303X and the SPD3303X-E, two linear programmable DC power supplies that share the same three-output architecture — two adjustable 0–32V/3.2A channels and one selectable 2.5/3.3/5.0V/3.2A channel for a 220W total. Both models present a 4.3 inch true color TFT-LCD and support independent, series, and parallel output modes.
The two models differ primarily in display resolution and output accuracy, letting a buyer match the precision of the supply to the requirements of the application while keeping the same channel layout, output modes, and interfaces.
Each model below is its own dedicated product page with condition-matched pricing for the new unit. Select the model that fits your application, then choose the listing that matches the condition and budget you need.
The SPD3303X is the higher-resolution member of the series, with a minimum resolution of 1mV/1mA and a 5-digit voltage / 4-digit current display. Its program and readback accuracy are specified as ±(0.03% of reading + 10mV) for voltage and ±(0.3% of reading + 10mA) for current, which supports accurate output even with very small changes in voltage or current.
The SPD3303X offers a minimum resolution of 1mV/1mA with a 5-digit voltage and 4-digit current display, and tighter program/readback accuracy of ±(0.03% of reading + 10mV) on voltage and ±(0.3% of reading + 10mA) on current. The SPD3303X-E provides a 10mV/10mA resolution with a 4-digit voltage and 3-digit current display, and program/readback accuracy of ±(0.5% of reading + 2 digits) on both voltage and current.
Aside from resolution, display digits, and accuracy, the two models share the same outputs, modes, protections, and USB Device and LAN connectivity. The comparison table that follows lists these per-model values side by side.
| Model | Output (CH1/CH2) | Resolution | Voltage Accuracy |
|---|---|---|---|
| SPD3303X-E | 32V/3.2A ×2, 2.5/3.3/5.0V/3.2A ×1 | 10mV/10mA | ±(0.5% of reading + 2 digits) |
| SPD3303X | 32V/3.2A ×2, 2.5/3.3/5.0V/3.2A ×1 | 1mV/1mA | ±(0.03% of reading + 10mV) |
Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.
| Specification | Value |
|---|---|
| Channel | |
| CH1 Output | Output voltage: 0～32V, output current: 0～3.2A |
| CH2 Output | Output voltage: 0～32V, output current: 0～3.2A |
| CH3 Output | 2.5/3.3/5.0V, output current: 3.2A |
| Display | |
| Display | 4.3 inch true color TFT-LCD, 4 digits voltage 3 digits current |
| Resolution | |
| Resolution | 10mV/10mA |
| Program Accuracy | |
| Voltage | ±(0.5% of reading + 2 digits) |
| Current | ±(0.5% of reading + 2 digits) |
| Readback Accuracy | |
| Voltage | ±(0.5% of reading + 2 digits) |
| Current | ±(0.5% of reading + 2 digits) |
| Constant Voltage Mode | |
| Line Regulation | ≤0.01%+2mV |
| Load Regulation | ≤0.01%+2mV |
| Ripple & Noise | ≤300μVrms |
| Recovery Time | ＜50μs (50% load change, minimum load 0.5A) |
| Constant Current Mode | |
| Line Regulation | ≤0.2%+3mA |
| Load Regulation | ≤0.2%+3mA |
| Ripple & Noise | ≤3mArms |
| Parallel Mode | |
| Line Regulation | ≤0.01%+3mV |
| Load Regulation | ≤0.01%+3mV |
| Series Mode | |
| Line Regulation | ≤0.01%+5mV |
| Load Regulation | ≤300mV |
| CH3 | |
| Output Voltage | (2.5/3.3/5V) ±8% |
| Line Regulation | ≤0.01%+3mV |
| Load Regulation | ≤0.01%+3mV |
| Ripple & Noise | ≤1mVrms (5Hz～1MHz) |
| General | |
| Locking Key | Yes |
| Memory Save/Recall | 5 Sets |
| Max Output Power | 220W |
| Power Source | AC 100V/120V/220V/230V ±10% 50/60Hz |
| Interface | USB Device, LAN |
| Insulation | Case to Terminal ≥20MΩ (DC 500V); Case to AC line ≥30MΩ (DC 500V) |
| Operating Environment | Elevation ≤2000m, Environment Temperature 0~40℃, Relative Humidity ≤80%, Installation Level II, Pollution Level 2 |
| Storage Environment | Environment Temperature -10~70℃, Relative Humidity ≤70% |
| Dimension | 225(W)×143(H)×278(D) mm |
| Weight | ≈ 8.0kg |
Important: CH3 selectable output voltage (2.5/3.3/5V) carries a ±8% tolerance.
ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.
Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.
Model No
Siglent
Condition
Factory New
Manufacturer
Siglent
Dcsup_amps
3.2 A
Dcsup_volts
32 V
Dcsup_watts
220 W
30+ Years in Business
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On-site Lab
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