Siglent SPD3303C 220W 3CH programmable power supply
The Siglent SPD3303C is a high-performance, programmable DC power supply with a resolution of 10 mV for voltage and 10 mA for current, offering precise and stable control for a wide range of test and development tasks. It provides three independent outputs (two adjustable up to 32 V / 3.2 A and one fixed 2.5 V / 3.3 V / 5 V), delivering a total output power of 220 W. Designed for laboratories, R&D, and educational applications, the SPD3303C also features advanced protection against overloads and short circuits, ensuring safe and reliable operation
Siglent SPD3303C Programmable DC Power Supply
The Siglent SPD3303C is a versatile linear DC power supply designed for accuracy, stability, and reliability in everyday test environments. With its 10 mV voltage and 10 mA current resolution, it provides precise control suitable for most laboratory, R&D, production, and educational applications. Compact and intuitive, it delivers dependable performance across a wide range of test scenarios.
Performance and Flexibility
This model features three independent outputs, including two adjustable channels (0–32 V / 0–3.2 A) and one fixed channel with selectable voltages of 2.5 V, 3.3 V, or 5 V at 3.2 A. Together, they provide a maximum total power of 220 W. Outputs can be used independently, combined in series mode for higher voltage (up to 60 V), or in parallel mode for higher current (up to 6.4 A), giving users flexibility for different testing requirements.
The LED display provides clear readouts with 4-digit resolution for voltage and 3-digit resolution for current, ensuring straightforward monitoring of output conditions. Operating in both constant voltage (CV) and constant current (CC) modes, the SPD3303C guarantees reliable and stable power delivery.
Applications of the SPD3303C
The SPD3303C’s balance of performance, resolution, and versatility makes it well suited for:
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Electronics Development & R&D: Power and test prototypes with dependable and stable supply outputs.
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Education & Training: Safe and simple operation makes it a reliable tool for teaching labs and technical schools.
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Manufacturing & Production Testing: Multiple outputs and programmable control enable consistent and repeatable testing.
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Embedded Systems & Microcontrollers: The fixed 2.5 V, 3.3 V, and 5 V channel is ideal for powering logic circuits and MCU-based designs.
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Communications & IoT Hardware: Series and parallel operation extend the range for testing wireless modules, routers, and IoT devices.
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Battery Simulation & Charging: CV and CC operation modes allow emulation of real-world charging and discharging scenarios.
Why Choose the SPD3303C?
The SPD3303C delivers stable performance with a practical resolution of 10 mV / 10 mA, making it a solid choice for general-purpose testing across education, development, and production environments. Combined with safety features, intuitive operation, and flexible output modes, it offers excellent value for engineers, educators, and technicians who need a dependable programmable DC power supply.
Series/parallel/independent output modes
Series-parallel function combines two power supplies into one and makes it very convenient for many applications. The 3303C has three independent outputs which can be controlled separately and also be turned on or off separately or at the same time.
Remote Control Capability
The Siglent SPD3303C offers flexible remote control options that make it easy to integrate into automated test setups and laboratory environments. Equipped with a USB Device interface and full support for SCPI (Standard Commands for Programmable Instruments), the power supply can be operated directly from a PC or connected to automated test systems.
Users can remotely set and monitor all key parameters, including voltage, current, output modes (independent, series, parallel), and protection functions. The supplied PC software enables convenient control, real-time monitoring, and data logging, ensuring accurate tracking of test conditions and results.
This remote functionality allows engineers and educators to streamline workflows, reduce manual operation errors, and achieve consistent test results across repetitive procedures. Whether in R&D, production, or teaching environments, the SPD3303C’s remote control capability enhances efficiency, precision, and overall usability.
| Model Overview | SPD3303C |
|---|---|
| Channel Output |
CH1: 0–32 V / 0–3.2 A CH2: 0–32 V / 0–3.2 A CH3: 2.5 / 3.3 / 5 V, 3.2 A |
| Display | LED display 32 V full scale, 4 digits 3.2 A full scale, 3 digits |
| Resolution | Voltage: 10 mV Current: 10 mA |
| Program 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) |
| Total Power | 220 W |
| Tracking Modes | Independent / Series / Parallel |
| Series Mode Rating | Up to 60 V, 0–3.2 A (CH1+CH2) |
| Parallel Mode Rating | 0–32 V, 0–6.4 A (CH1∥CH2) |
| Protection | Overload & short-circuit protection; OCP |
| Functions | Panel timing output, 5 groups of memory save/recall |
| Interfaces | USB Device, SCPI command support |
| AC Input | 100 V / 120 V / 220 V / 230 V ±10%, 50/60 Hz |
| Size & Weight | 275 × 225 × 136 mm, 7.5 kg |
Accessories Included with Siglent SPD3303C
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Power cord
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USB cable for PC connection
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Quick Start Guide (printed manual)
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Calibration certificate / warranty card
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Test leads (pair, for output connection)
Optional Accessoires:
Siglent SPD3000 Rack Mount Kit (SPD3000 Series Power Supplies)
Compatible with Siglent SPD3xxx Power Supplies. Holds one power supply.
Power Supply is not included.
4U Height, compatible with 19″ racks.
Siglent SDL/PWR High-Current Cable Set
(Red & Black, 2-Pack)
Durable 10 AWG cable set (1 m each) with M6 ring terminals, designed for Siglent SDL DC electronic loads and all Siglent power supplies. Rated for 30 A continuous current, 600 V, 105 °C, RoHS & CE compliant. Includes 1x red and 1x black cable for secure, high-current test connections.