APR 400 B420L

Current Sensors Overview

The APR 400 B420L is an AC current transducer from LEM's APR-B420L series, designed for primary currents ranging from 10 A to 400 A. It features a selectable AC current range of 200 A, 300 A, or 400 A via an internal switch. The device provides a true RMS measurement with a 4-20 mA DC loop-powered current output. Key electrical specifications include a maximum supply current of 25 mA and a response time of 400 ms. It operates within a temperature range of -20°C to +60°C and supports bidirectional polarization.

Current Sensors Feature Summary

• Offers selectable primary current ranges (200A, 300A, 400A) for flexible configuration
• Provides true RMS measurement capability for accurate AC current monitoring
• Features a 4-20 mA DC loop-powered output signal for industrial integration

Current Sensors Applications

• Inverter applications requiring precise AC current feedback
• Industrial power monitoring systems
• Motor drive control circuits

Current Sensors Procurement Notes

Verify the specific order code against the manufacturer's official documentation to ensure the correct selectable range configuration. Confirm that the procurement channel is authorized to guarantee component authenticity. Check technical datasheets for updated environmental ratings and mounting requirements before finalizing acquisition.

Current Sensors Selection Notes

Select this model when a true RMS AC current transducer with a 4-20 mA output is required. Ensure the application current falls within the selectable 200A to 400A range. Verify compatibility with the 24V operating voltage and check if chassis, DIN rail, or panel mounting suits the mechanical design constraints.

Current Sensors Part Context

This component belongs to the APR-B420L series of AC current transducers by LEM USA Inc. The series includes variants for different current ranges, such as the APR 50 B420L and APR 100 B420L. These devices are engineered for robust performance in industrial environments, offering isolation and reliable signal conditioning for primary current sensing.

Current Sensors Replacement Considerations

Cross-reference with other models in the APR-B420L family, such as APR 50 B420L or APR 100 B420L, if different current ranges are needed. Ensure any substitute maintains the same 4-20 mA output type and true RMS functionality.