LA 255-S/SP7

Current Sensors Overview

The LA 255-S/SP7 is a closed-loop Hall effect current sensor manufactured by LEM USA Inc. It features a primary nominal RMS current of 300A and a measuring range of 0 to ±500A. The device provides a secondary output current of 1500mA and operates with a supply voltage of ±15V. Key electrical specifications include a linearity of ±0.2%, accuracy of ±0.5%, and a response time of 1µs. It supports AC/DC measurement, offers bidirectional polarity, and functions within a temperature range of -40°C to +85°C.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high precision and linearity for accurate current monitoring.
• Bidirectional sensing capability allows for the detection of both positive and negative current flows.
• High bandwidth performance supports fast response times suitable for dynamic power applications.

Current Sensors Applications

• Industrial motor drives and inverter systems
• Power supply and switching mode power supplies (SMPS)
• Welding equipment and battery management systems

Current Sensors Procurement Notes

Verify component authenticity through authorized LEM distributors or certified partners. Confirm that the specific suffix SP7 matches the required pinout and mounting configuration for your design. Check for RoHS compliance status and ensure the part meets regional regulatory standards. Review the latest datasheet for any updates regarding operating conditions or recommended circuit designs before finalizing procurement.

Current Sensors Selection Notes

Select this model when a 300A nominal current rating and ±500A measuring range are required. Ensure the application demands closed-loop accuracy rather than open-loop simplicity. Verify that the module form factor fits the available space and that the ±15V supply voltage aligns with the system's power architecture. Consider thermal management requirements given the operational temperature limits.

Current Sensors Part Context

This component belongs to the LA series of industrial current sensors from LEM. These sensors are designed for robust performance in demanding environments. The LA 255-S/SP7 variant specifically targets medium-to-high current applications requiring precise feedback control. It represents a standard solution for isolation and measurement in power electronics.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not provided in the source data. Consult LEM technical support for direct replacements or updated series alternatives if this specific part number is discontinued or unavailable.