Lambda / TDK / EMI EMS20-125-2

The Lambda/TDK EMI EMS20-125-2 is a 2500 W regulated DC power supply engineered for integration into industrial test, measurement, and automation systems. It delivers adjustable 0–20 VDC output at 0–125 A with tight voltage and current regulation, designed to minimize electromagnetic interference and susceptibility in sensitive applications. Soft-start circuitry reduces inrush current during power-on, while dual-mode constant-voltage/constant-current operation and remote sensing capability provide flexible control. The unit accepts single-phase or three-phase input from 190–250 VAC (50–60 Hz) and operates at approximately 85% efficiency with variable-speed fan cooling.

Technical Specifications Electrical Performance

Output: 0–20 VDC, 0–125 A

Input: 190–250 VAC, 50–60 Hz (1 or 3 phase); 208–240 VAC

Voltage regulation: <0.1% for 100% load change

Current regulation: <0.1% for full-load to short-circuit transition

Temperature coefficient (voltage): 0.02%/°C of rated output

Temperature coefficient (current): 0.03%/°C of rated output

Efficiency: ~85%

Power output: 2500 W Physical

Dimensions: 3.5 × 5.0 × 12.6 inches

Key Features

Low-ripple DC output

CV/CC auto-crossover for constant-voltage or constant-current mode

Remote voltage and current sensing inputs

Soft-start topology - standard across all EMS models

Front-panel adjustment and local control

Overvoltage, overcurrent, and overtemperature protection

Variable-speed fan cooling with thermal management

Typical Applications Test and measurement of industrial power systems, component burn-in and qualification, battery charging, electroplating, and laboratory DC power distribution. Suited for environments requiring EMC compliance and stable, low-noise power delivery.

Compatibility & Integration Designed as a component for professional assembly into final apparatus. EMC compliance remains the responsibility of the system integrator. Operation requires qualified personnel due to the presence of hazardous internal voltages.