Lambda / TDK / EMI TCR 20T250

The TDK Lambda EMI TCR 20T250 is an SCR phase-controlled regulated DC power supply delivering 5 kW at 20 V and 250 A output in a compact 2U rack format. Built for industrial, commercial, and laboratory environments, it combines constant voltage and constant current regulation with automatic crossover to maintain stable power delivery across test, measurement, and manufacturing applications. The unit features low output ripple, high efficiency, and flexible analog and digital programming interfaces for seamless integration into automated test systems and production equipment.

Technical Specifications

• 5 kW output power at 20 V, 250 A


• Constant Voltage (CV) and Constant Current (CC) regulation with automatic crossover


• Line regulation: 0.05% of rated output


• Load regulation: 0.1% of rated output


• Temperature coefficient: 0.02%/°C (output voltage), 0.03%/°C (output current)


• Low output ripple; fan-cooled with horizontal airflow Input Power:


• Single-phase: 85–265 VAC (47–63 Hz)


• Three-phase: 208/220/230 VAC (47–63 Hz); optional 342–460 VAC for 400 V models


• Typical input current draw: 23 A at full load (3-phase)


• Active Power Factor Correction (three-phase AC input)

Key Features

• Remote sensing for accurate voltage delivery at load


• Analog programming: 0–100% voltage and current via 0–5 V or 0–10 V signal, or resistor programming (0–5/10 kΩ)


• Programming accuracy: ±0.5% (voltage), ±1% (current)


• Digital interface: RS-232/RS-485 standard; optional IEEE 488.2 (GPIB) with SCPI, isolated analog programming, and LAN


• Voltage and current monitoring outputs: 0–5 V or 0–10 V, ±1% accuracy


• CV/CC indicator and Power Supply OK status signals


• On/off control via electrical signal (0–0.6 V or 2–15 V) or dry contact with user-selectable logic

Typical Applications Test and measurement, manufacturing process control, research facilities, and industrial power delivery applications requiring precise voltage and current regulation.

Compatibility & Integration Standard RS-232/RS-485 connectivity enables integration with test automation and data acquisition systems. Optional GPIB and LAN interfaces support legacy and modern network-based control architectures.