Siglent SPD3303X-E

Programmable DC Power Supply

The Siglent SPD3303X-E is a programmable linear DC power supply designed for laboratory, R&D and advanced test-bench applications. It features three independently controlled and isolated outputs: two fully adjustable channels (0-32 V / 0-3.2 A each) plus a selectable fixed-voltage channel (2.5 V / 3.3 V / 5.0 V at up to 3.2 A). With a total output power rating of up to ~220 W, the unit supports independent, series (up to ~60 V) and parallel (up to ~6.4 A) output modes. The front panel offers a 4.3″ full-colour TFT-LCD (480×272) display with real-time waveform monitoring, and the unit includes remote-programming capabilities (USB / LAN) and a timing/output scripting feature. This supply therefore provides a flexible, high-precision tool for powering prototypes, embedded systems, microcontrollers (via the fixed 2.5/3.3/5 V channel), and test setups requiring combinations of voltage and current. Its programmability, multiple modes, and isolated outputs make it especially useful in production, research labs or educational environments.

Technical Specifications

Feature	Specification
Number of outputs	3 independently controlled, isolated outputs
Channel 1 output	0 to +32 V, 0 to 3.2 A
Channel 2 output	0 to +32 V, 0 to 3.2 A
Channel 3 output	Selectable 2.5 V / 3.3 V / 5.0 V, up to 3.2 A
Total maximum output power	Up to ~ 220 W
Output modes	Independent, Series (≈ 0-60 V), Parallel (≈ 0-32 V / ≈ 0-6.4 A)
Display	4.3″ colour TFT-LCD (480×272)
Resolution (voltage / current)	10 mV / 10 mA
Setting accuracy (voltage / current)	±(0.5% of reading + 2 digits) for both voltage and current
Read-back accuracy	Same as setting accuracy
Interfaces	USB-TMC, LAN (for remote control)
Timer / storage features	5 groups of parameter save/recall, panel timing/output functions
AC input	100/110/220/230 V ±10%, 50/60 Hz
Protection	Overload protection, short-circuit protection
Cooling / fan	Temperature-controlled fan for low noise
Weight / Dimensions (approx.)	~8 kg; ~ 22.5 cm × 14.3 cm × 27.8 cm (≈8.86″ × 5.63″ × 10.95″)