Lambda / TDK / EMI CS250EI

The TDK-Lambda EMI CS250EI is a 250 W modular switch-mode power supply engineered for industrial and commercial systems requiring multiple regulated outputs. It combines universal AC input (85–264 VAC, 47–440 Hz) with power factor correction compliant to EN61000-3-2, delivering up to six fully independent outputs with configurable voltage levels. The design integrates comprehensive protection - short-circuit recovery, overvoltage shutdown, and thermal safeguards - alongside remote sense capability on selected outputs. Forced-air cooling and conformal design support operation across 0 °C to +50 °C at full load, with derating from 50 °C to 70 °C.

Technical Specifications Input

AC Input: 85–264 VAC, 47–440 Hz

DC Input: 120–340 VDC

Maximum Input Current: 5 A

Inrush Current: 5 V outputs)

Ripple and Noise: 1% peak-to-peak (>5 V); 50 mV peak-to-peak (≤5 V); 70% typical at 230 VAC, full load

Key Features

All outputs short-circuit protected with auto-recovery

Overvoltage protection with automatic shutdown and restart

Over-temperature protection on converter and regulators

Remote sense on main board outputs 1 & 2 and output modules

Leakage current: <800 μA at 264 VAC, 50 Hz

Typical Applications Industrial process control, test and measurement systems, distributed power architectures requiring isolated multi-voltage rails.

Compatibility & Integration Complies with EN55022 (Class B conducted, Class A radiated), FCC Class B/A, UL E135494, CSA LR91780-96, IEC/EN 60950-1, and CE Mark (73/23/EEC). Modular architecture permits custom output module selection. Cooling options include end-mounted or top-mounted fans; customer air versions available.