LF 505-S/SP40

Current Sensors Overview

The LF 505-S/SP40 is a closed-loop Hall effect current sensor manufactured by LEM USA Inc. It features a single channel with a nominal primary current of 500 A and a secondary current output. The device operates on a dual supply voltage ranging from ±15 V to ±24 V. It supports bidirectional measurement for AC, DC, and pulsed currents within a frequency range of DC to 100 kHz. Key performance specifications include an accuracy of ±0.6%, linearity of ±0.1%, and a response time of 1 µs. The unit is designed for base mounting in a module package.

Current Sensors Feature Summary

• Closed-loop Hall effect technology providing galvanic isolation between primary and secondary circuits
• Bidirectional measurement capability suitable for AC, DC, and pulsed current applications
• High precision with specified accuracy and linearity metrics for reliable signal fidelity

Current Sensors Applications

• Power supply systems
• Renewable energy installations
• Industrial motor drives

Current Sensors Procurement Notes

Verify the specific suffix SP40 against the manufacturer's latest documentation to confirm pinout and mechanical dimensions. Check for Product Change Notifications (PCN) regarding component updates or lifecycle status. Ensure the ordering quantity aligns with the manufacturer's standard packaging requirements. Confirm RoHS3 compliance status if required for your assembly process. Validate that the ±15V to ±24V dual supply requirement matches your system design capabilities.

Current Sensors Selection Notes

Select this model when a 500 A nominal current rating and high-speed response are required. The closed-loop architecture ensures superior linearity compared to open-loop alternatives. Verify that the 30.2 mm aperture diameter accommodates the primary conductor size. Ensure the operating temperature range of -40°C to +70°C fits the environmental conditions. Confirm that the current output interface is compatible with the downstream signal conditioning circuitry.

Current Sensors Part Context

This component belongs to the LF series of high-performance current transducers from LEM. The LF 505-S variant is characterized by its 500 A RMS nominal rating and compact module design. The SP40 suffix denotes a specific configuration within this family, typically related to mounting or connector options. These sensors are engineered for demanding industrial environments requiring precise current monitoring.

Current Sensors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Consult LEM USA Inc. directly for official cross-reference recommendations or updated models replacing this discontinued or limited-stock item.