Lambda / TDK / EMI LP531-FM

The TDK-Lambda LP531-FM is a regulated DC power supply delivering 0–20 VDC at up to 5.7 A (114 W) for industrial and laboratory test benches. It combines precision voltage regulation with electronic current limiting, dual front-panel meters, and remote sensing capability to compensate for lead resistance. Designed for continuous duty from 0°C to +60°C, the unit operates from 105–132 VAC input and features both coarse and fine adjustment controls for voltage and current, plus integrated short-circuit protection and thermostat-based thermal shutdown with automatic reset.

Technical Specifications

• Output voltage: 0–20 VDC


• Maximum output current: 5.7 A


• Output power: 114 W


• Voltage regulation (line/load): <0.2% or 5 mA, whichever is greater


• Voltage regulation (typical): 0.01% + 1 mV


• Ripple (RMS, typical): 500 µV


• AC input: 105–132 VAC, 47–440 Hz (ratings based on 57–63 Hz)


• Operating temperature: 0°C to +60°C (continuous duty)


• Storage temperature: −55°C to +85°C


• Cooling method: Convection cooled


• Dimensions: 5-3/16" W × 8-3/8" H × 15-5/8" D


• Net weight: ~7 lbs

Key Features

• Adjustable electronic current limiting to 105% of rated current


• Coarse and fine voltage adjustment controls; single current adjustment control


• Voltmeter and ammeter display on front panel


• Remote sensing input to eliminate output lead voltage drop effects


• Short-circuit proof with continuously adjustable current limiting


• Thermal overload protection with automatic reset


• Internal fuse protection


• Power On-Off switch with indicator light

Interfaces & Connectivity

• AC input: Covered terminal block (rear)


• DC output: Covered terminal block (rear) plus five-way binding posts (front panel) for positive, ground, and negative connections

Typical Applications Bench-top testing, circuit development, component characterization, and equipment calibration in environments where stable, adjustable low-voltage DC is required.