LA 55-P/SP26

Current Sensors Overview

The LEM LA 55-P/SP26 is a PCB-mountable, closed-loop Hall effect current transducer designed for the electronic measurement of DC, AC, and pulsed currents. It features a primary nominal current (IPN) of 50 A RMS and offers galvanic isolation between the high-power primary circuit and the secondary control circuit. The device provides instantaneous output with excellent accuracy of 0.65% and very good linearity. It operates on an external DC bipolar supply voltage ranging from 12 V to 15 V. The operational temperature range spans from -40 °C to +85 °C, ensuring reliable performance in industrial environments.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high precision and low temperature drift
• Galvanic isolation separates primary high-power circuits from secondary control electronics
• Optimized for bidirectional current measurement with excellent linearity

Current Sensors Applications

• Industrial motor drives and power electronics
• Battery management systems requiring precise current monitoring
• Inverter and converter applications in renewable energy systems

Current Sensors Procurement Notes

Verify that the specific suffix /SP26 matches the required packaging or configuration variant as defined by LEM USA Inc. Confirm that the operating supply voltage aligns with the specified 12-15 V DC bipolar requirement. Ensure the PCB layout accommodates the thermal and electrical isolation requirements inherent to closed-loop Hall sensors. Cross-reference the datasheet for pinout compatibility before integration.

Current Sensors Selection Notes

Select this component when high-accuracy measurement of bidirectional currents up to 50 A RMS is required. The closed-loop architecture is suitable for applications demanding low offset and minimal phase shift. Consider the PCB-mount form factor for space-constrained designs. Verify that the environmental temperature range of -40 °C to +85 °C meets the system's operational conditions.

Current Sensors Part Context

The LA 55-P belongs to LEM's LA series of current transducers, which are widely used in industrial automation and power conversion. This series utilizes closed-loop Hall effect technology to provide isolated current sensing. The model represents a standard PCB-mountable solution designed for robust performance in demanding electrical environments.

Current Sensors Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult LEM USA Inc. directly for equivalent models or updated series replacements.