Review: Siglent SPD3303X-E Power Supply

Siglent SPD3303X-E 220 W Triple Output Programmable DC Power Supply

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Reliable, quiet, and feature-rich, the Siglent SPD3303X-E is a professional-grade 3-channel bench power supply combining precision, connectivity, and clean linear performance. Offering two adjustable outputs (0–32 V/3.2 A) and one fixed output (2.5/3.3/5 V @ 3.2 A), it’s ideal for design, testing, and educational environments. USB and LAN interfaces allow full remote control and automation for laboratory use.

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Overview

A trusted mid-range lab supply from Siglent’s SPD X-E series, offering excellent voltage and current stability with low ripple and noise (< 350 µVrms/2 mArms). Compact yet powerful, it’s a staple in electronics labs and makerspaces.

Key Features & Specs

Dual adjustable channels (0–32 V/0–3.2 A) + 1 fixed output (2.5/3.3/5 V @ 3.2 A)
220 W total output power
Resolution: 1 mV / 1 mA
Low ripple/noise: < 350 µVrms / 2 mArms
Channel tracking, series/parallel modes
Bright 4.3″ TFT LCD display
USB and LAN interfaces (SCPI remote control)
OVP/OCP protection and intelligent fan control
Dimensions: 250 × 110 × 295 mm | Weight: 6.5 kg

Pros

Triple output design with independent and tracking modes
Quiet linear operation and low noise output
Excellent build quality for the price
PC connectivity and SCPI automation support
Easy to use interface with large colour display

Cons

Slightly heavier than switch-mode alternatives
Limited to 3.2 A per channel (max)

Who It’s For

Design engineers needing stable multi-rail supplies for development and testing
Educational labs and training centres requiring programmable control and LAN connectivity
Hobbyists and makers who want a serious, low-noise bench supply for analog and digital projects
Automation users looking for SCPI or LabVIEW integration for test scripts and data logging
Repair technicians wanting a dependable supply for component and board testing

Verdict

The Siglent SPD3303X-E delivers the precision and features of a professional-grade lab supply at a mid-range price. Its quiet operation, triple outputs, and LAN/USB interfaces make it one of the most popular choices for engineers and educators alike. An excellent investment for anyone building a serious bench.

⭐ Ratings (out of 5 stars)

Build Quality: ⭐⭐⭐⭐⭐ Accuracy & Performance: ⭐⭐⭐⭐☆ Ease of Use: ⭐⭐⭐⭐☆ Features & Range: ⭐⭐⭐⭐⭐ Value for Money: ⭐⭐⭐⭐☆

The Siglent SPD3303X-E is a professional-grade programmable power supply that delivers exceptional precision, flexibility, and safety for demanding bench applications. Its dual-channel 32 V/3.2 A outputs (plus a fixed 2.5/3.3/5 V rail) provide highly stable power for analog and digital circuits alike. The intuitive interface, bright TFT display, and full remote control capability make it ideal for both lab and production environments. While its maximum current per channel is modest at 3.2 A, the SPD3303X-E’s overall performance and build quality easily justify its price, making it one of the most capable and reliable lab supplies in its class.

Overall: 9.0 / 10