The TDK-Lambda EMI LK351 is a programmable DC power supply and single-stage EMC filter engineered to suppress both common-mode and differential-mode noise across industrial, medical, and telecommunications applications. This 900 W unit delivers 0–36 V DC at up to 25 A with exceptional regulation stability and rapid transient response, meeting stringent EMC compliance requirements through conducted emissions mitigation up to 30 MHz.
Technical Specifications
Input voltage ranges from 85–265 V AC (single-phase) at 47–63 Hz. Output is programmable 0–36 V DC at 0–25 A, yielding 900 W maximum power. Line regulation holds ≤0.01% of full scale (or 0.015% or 1 mV, whichever is greater) across 105–132 VAC. Load regulation maintains the same tolerance for no-load to full-load transitions. Output ripple and noise measures ≤10 mV RMS or ≤0.5 mV RMS when either positive or negative terminal is grounded, or less than 1 mVrms. Voltage programming accuracy is ≤0.1% of rated output; current accuracy is ≤0.2% of rated output. Transient response time is ≤1 ms for 50–100% load changes. Typical efficiency exceeds 85%.
– Key Features
• Automatic crossover constant-current regulation with voltage limit
• Adjustable overcurrent protection, settable to 105% of rated current
• Overvoltage and overtemperature protection with automatic thermostat reset
• Internal fuse protection against internal failures
• Front-panel coarse and fine voltage and current adjustment controls
• Digital voltmeter and ammeter display
• Remote sensing provision to eliminate power output lead resistance effects
• Remotely programmable by voltage or resistance input on all models
• Convection cooling with internal fan for forced air circulation
– Thermal Performance
Operating temperature range: 0°C to +71°C continuous at rated load, or 0°C to +71°C ambient with tabulated derating. At 50 Hz operation, derate output current by 10%. Storage temperature: −55°C to +85°C.
– Physical & Integration
1U, 19-inch rack-mountable chassis measuring 5-3/16″ × 19″ × 16-1/2″ (140 × 124 × 350 mm), weighing approximately 4.5 kg. Brushed aluminum panel with grey inlay (standard). Rear terminal block for AC input and DC output connections. Power control via front-panel on/off switch or circuit breaker.
