Lambda / TDK / EMI LPD423A

The TDK-Lambda LPD423A is a single-phase AC-input power supply engineered for industrial automation, telecommunications, and critical infrastructure applications. It delivers stable DC output with high efficiency in a compact 126.5 × 82 × 240 mm form factor, incorporating multiple protection mechanisms and remote control capabilities for demanding operational environments.

Technical Specifications

• Input voltage: 85–265 VAC, 47–63 Hz (100–240 VAC, 50–60 Hz for specific safety certifications)


• Hold-up time: 20 ms


• Leakage current: 1.2 mA maximum at 100/240 VAC (typically 0.2 mA at 100 VAC, 0.4 mA at 230 VAC)


• Temperature coefficient: 105% of rated output current


• Overvoltage protection: Enabled with output shutdown; manual reset via power cycle or ON/OFF control signal


• Remote sensing: Supported on applicable models


• Remote ON/OFF control: Supported


• Output voltage external control: Supported


• Parallel operation: Supported


• Series operation: Supported


• Monitoring signal: PF output (open collector) Environmental


• Operating temperature: −10 to +71 °C


• Storage temperature: −40 to +85 °C


• Operating humidity: 10–90% RH (non-condensing)


• Vibration: MIL-STD-810F 514.5 compliant when bracket-mounted


• Shock: MIL-STD-810F 516.5 compliant when bracket-mounted

Key Features

• Compact industrial-grade enclosure


• Multiple protection modes for critical applications


• Flexible control interface supporting remote operation


• Extended operating temperature range


• Rugged construction meeting military vibration and shock standards

Typical Applications

• Industrial automation systems


• Telecommunications equipment


• power delivery


• Systems requiring stable DC supply in variable AC input environments

Compatibility & Integration The LPD423A supports parallel and series configuration for scaled power delivery. Remote sensing and external voltage control enable integration into automated test and control systems. Open collector monitoring output facilitates status monitoring in supervisory control architectures.