UNI-T UDP3305S High-Performance Programmable Linear DC Power Supply 4 Channels
The UNI-T UDP3305S is a four-channel, high-performance linear programmable DC power supply designed for versatile bench and automated testing environments. Its front-panel features a 4.3″ TFT display that simultaneously shows real-time voltage, current, and power for up to three selected outputs, while a dedicated USB-powered 5 V/2 A channel provides auxiliary power for external devices. Channels 1 and 2 each deliver up to 32 V/5 A, channel 3 up to 6 V/3 A, and channel 4 is fixed at 5 V/2 A, with individual on/off switching and independent regulation modes (CV/CC) for each output.
The UDP3305S offers ultra-low ripple (<350 µV rms, 2 mVpp), fast transient response (≤50 µs for 50 % load steps), and high-precision programming/readback accuracy (voltage ± 0.03 % + 10 mV, current ± 0.2 % + 5 mA) under 25 ± 5 °C. Built-in functions include list-mode sequencing (up to 2048 steps), delay-mode switching, waveform display, and extensive protection (OVP/OC OCP/OTP) with audible and visual alarms.
Connectivity options USB Host/Device, LAN, RS-232, and digital I/O enable SCPI remote control and integration into automated test systems, while an internal fan with fault-detection ensures safe operation across 0 °C to 40 °C. In total, it delivers 348 W of clean, programmable power with the precision and flexibility demanded by R&D, production, and educational labs.
Features:
- Four fully isolated outputs: CH1/CH2 (0–32 V/0–5 A), CH3 (0–6 V/0–3 A), CH4 (5 V/2 A USB).
- Linear regulation with ultra-low ripple (<350 µV rms, 2 mVpp) and fast transient response (≤50 µs).
- Independent CV/CC modes and individual on/off switching per channel.
- List-mode (2048 steps) and delay-mode sequencing for dynamic output profiles.
- Built-in waveform display of voltage, current, and power trends.
- Multi-interface remote control (USB Host/Device, LAN, RS-232, Digital I/O) with SCPI support.
- Comprehensive protection: OVP, OCP, OTP, with alarm and shutdown options.
- Key-lock, preset recall (5 sets), and firmware upgrade via USB.
Specifications:
| Parameter | UDP3305S | Conditions / Notes |
|---|---|---|
| Channels: | 4 | CH1/CH2: 0–32 V/0–5 A; CH3: 0–6 V/0–3 A; CH4: 5 V/2 A USB |
| Total Power: | 348 W | Sum of all outputs |
| Voltage Regulation (CV): | ≤ 0.01 % + 2 mV | Load/line regulation |
| Current Regulation (CC): | ≤ 0.01 % + 250 µA | Load/line regulation |
| Ripple & Noise: | < 350 µV rms / 2 mVpp | 5 Hz–1 MHz |
| Transient Response: | ≤ 50 µs | 50 % load step, ≥ 0.5 A load |
| Programming Accuracy (25 ± 5 °C): | V: ±(0.03 % + 10 mV) I: ±(0.2 % + 5 mA) | |
| Readback Accuracy (25 ± 5 °C): | V: ±(0.03 % + 10 mV) I: ±(0.15 % + 5 mA) | |
| Display Resolution: | V: 1 mV (5 digits), I: 1 mA (4 digits) | |
| Interfaces: | USB Host/Device, LAN, RS-232, Digital I/O | |
| Operating Temp. / Humidity: | 0 °C–40 °C / 20–80 % RH | Non-condensing |
| Dimensions / Weight: | 270 × 150 × 350 mm / 8 kg |
Applications:
- Automated Test Systems.
- R&D Laboratory Powering.
- Production-Line Quality Control.
- Educational and Training Laboratories.
- Battery Charging and Simulation.
- Automotive Electronics Testing.
Package Contents:
- 1x Programmable DC power supply unit
- 1x Three-core (3C) power cord
- 1x 250 V/4 A spare fuse (for 220 V input)
- 1x User manual
