Lambda / TDK / EMI LK343A

The Lambda/TDK LK343A is a regulated DC power supply engineered for applications requiring stable, precision power delivery. Operating from 105–132 VAC, 47–63 Hz input, It has adjustable output voltage and current with automatic crossover between constant voltage and constant current modes. The unit delivers up to 9.0 A at 40°C ambient, with temperature-compensated output regulation and low ripple performance.

Technical Specifications

• DC output line regulation: 0.015% or 1 mV (whichever greater) across 105–132 VAC input variations


• DC output load regulation: 0.015% or 1 mV (whichever greater) from no-load to full-load conditions


• Ripple and noise: 500 µV RMS (with either terminal grounded)


• Temperature coefficient: 0.015%/°C Current Capability


• 9.0 A maximum at 40°C ambient


• 8.5 A at 50°C ambient


• 7.8 A at 71°C ambient Constant Current Mode


• Line regulation: less than 10 mA or 0.1% (whichever greater) for 105–132 VAC input variations


• Load regulation: less than 10 mA or 0.1% (whichever greater) across rated VDC load voltage change Environmental


• Operating temperature range: 0°C to +71°C (continuous duty)


• Storage temperature range: −55°C to +85°C


• Thermal protection via automatic-reset thermostat Protection and Safety


• Adjustable electronic current limiting circuit (settable to 105% of rated current)


• Internal fuse protection


• Thermostat-based over-temperature shutdown with automatic reset

Key Features

• Front-panel coarse and fine voltage adjustment controls


• Front-panel coarse and fine current adjustment controls


• Integrated voltmeter and ammeter for real-time output monitoring


• Remote sensing provision to eliminate lead-resistance effects on DC regulation


• Convection cooling (no blower or external heat sink required)


• Rear-mounted terminal block connections


• Power On-Off switch for ½ rack configuration

Typical Applications Laboratory testing, equipment development, and field service applications requiring stable DC power with precise current and voltage control.