AHR 500 B420

Current Sensors Overview

The LEM USA Inc. AHR 500 B420 is an open-loop Hall effect current sensor designed for AC and DC measurement applications. It features a unidirectional polarization with a nominal sensing current of 500 A. The device operates within a temperature range of -40°C to 70°C and has a maximum supply current of 30 mA. Key electrical parameters include a response time of 150 ms, a frequency range of DC, and an accuracy of 1%. The unit utilizes a chassis mounting type for secure installation in industrial environments.

Current Sensors Feature Summary

• Open-loop Hall effect technology for reliable AC/DC current detection
• Unidirectional sensing capability with 500 A nominal rating
• Chassis mounting design for stable industrial integration

Current Sensors Applications

• Industrial motor drive systems
• Power supply monitoring
• Battery management systems

Current Sensors Procurement Notes

Verify the specific suffix 'B420' against official LEM documentation to confirm mechanical dimensions and pinout configuration. Ensure the operating environment remains within the specified -40°C to 70°C thermal limits. Confirm that the unidirectional nature aligns with the circuit topology, as this model does not support bidirectional flow. Cross-reference the 1% accuracy requirement with application tolerances before finalizing procurement.

Current Sensors Selection Notes

Select this component when a unidirectional AC/DC measurement solution is required with a 500 A capacity. The open-loop architecture offers a cost-effective alternative to closed-loop sensors where extreme precision is not critical. Consider the 150 ms response time suitability for the target control loop speed. Verify that chassis mounting constraints fit the available panel space and thermal dissipation requirements.

Current Sensors Part Context

The AHR series from LEM represents a line of open-loop Hall effect current transducers. These devices are engineered for robust performance in demanding industrial settings. The AHR 500 B420 specifically targets applications requiring moderate accuracy and high current handling. It complements LEM's broader portfolio of closed-loop and hybrid sensor technologies.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.