Lambda / TDK / EMI LQD-422

The Lambda/TDK EMI LQD-422 is a dual-channel regulated DC power supply engineered for laboratory, test, and industrial bench applications. Each channel delivers 0–40 VDC at 0–1.0 A (40 W per channel, 80 W total), with independent voltage and current controls on the front panel. The supply operates from 105–132 VAC, 47–440 Hz input, featuring excellent line regulation of 0.005% Vo + 0.5 mV and load regulation of 0.005% Vo + 10 µV.

A built-in digital panel meter with selector switch monitors voltage or current output in real time.

Technical Specifications

• Output: Dual channels, 0–40 VDC, 0–1.0 A per channel (80 W total)


• Input: 105–132 VAC, 47–440 Hz (derate output current 10% for 47–53 Hz)


• Line Regulation: 0.005% Vo + 0.5 mV


• Load Regulation: 0.005% Vo + 10 µV


• Temperature Coefficient: <0.015% per °C


• Dimensions: 5-3/16" H × 8-3/8" W × 10-5/8" D


• Weight: 12 lbs net; 15 lbs shipping


• Cooling: Convection cooled (fanless)

Key Features

• Multiturn voltage adjustment (1% to Vo max) with remote programming capability for full 0–Vo max range


• Single-turn current limiting adjustment (zero to maximum)


• Constant voltage/constant current automatic crossover operation


• Remote sensing provision to compensate output lead voltage drops


• Series/parallel operation with auto tracking to common reference


• Adjustable current limiting and thermal protection via self-resetting thermostat


• Primary and secondary fuse protection


• Five-way binding posts per channel; rear barrier strip input connections


• Five-year Lambda guarantee

Typical Applications Laboratory power source for component testing, circuit development, and bench troubleshooting. Flexible dual-channel architecture supports independent or linked supply configurations.

Compatibility & Integration 19" rack mounting via optional adapters (LRA-1, LRA-2). External overvoltage protectors (LHOV-4, LHOV-5, LHOV-6) available.