Lambda / TDK / EMI LPD423A-FM

The TDK-Lambda LPD423A-FM is a dual-output regulated DC power supply engineered for precision laboratory and industrial applications requiring independent voltage and current control. Front-panel meters provide simultaneous monitoring of voltage and current across both outputs, enabling real-time feedback during testing and characterization. Each output operates independently with continuously adjustable polarity selection and electronic current limiting, making this instrument suitable for benchtop configurations and integrated test systems.

Technical Specifications

Output Configuration: Dual independent DC outputs, each selectable for positive or negative polarity. Individual outputs: 0 to ±60 VDC. Series operation extends voltage output to 120 VDC; parallel operation delivers up to 1.4 A combined current. Current Performance: Temperature-dependent ratings apply to series operation - 0.7 A at 30°C, 0.6 A at 40°C, 0.5 A at 50°C, and 0.4 A at 60°C. Parallel operation supports 1.4 A maximum. Regulation & Stability: Line and load regulation measure less than 0.2% or 5 mA (whichever is greater). RMS ripple: 500 µV. Temperature coefficient: (0.015% + 0.5 mV)/°C. Input Power: AC input acceptance spans 105–132 VAC, 187–242 VAC, and 205–265 VAC operating windows. Frequency range: 47–440 Hz.

Key Features

• Coarse and fine adjustment controls for voltage and current on each output


• Built-in voltmeter and ammeter (-FM designation)


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


• Thermal protection with automatic reset; internal fuse backup


• Short-circuit proof operation via continuously adjustable current limiting


• Zero overshoot during turn-on, turn-off, or power failure transients


• Remote sensing provision to compensate for lead resistance losses


• Convection cooling - no blowers or external heat sinks required

Typical Applications Benchtop circuit development, precision device characterization, component validation, and multi-rail test setups where independent voltage/current metering and polarity flexibility are essential.

Compatibility & Integration Series and parallel connection schemes enable voltage stacking and current multiplication without external circuitry. Remote sensing option integrates with distributed test architectures. Universal input voltage coverage supports global laboratory deployment.