LF 505-S/SP26

Current Sensors Overview

The LF 505-S/SP26 is a closed-loop Hall effect current transducer manufactured by LEM USA Inc. Designed for electronic measurement of DC, AC, and pulsed currents, it provides galvanic isolation between the primary high-power circuit and the secondary control circuit. The device features a nominal primary RMS current of 500A with a measuring range of ±1480A. It operates within a supply voltage range of ±15V to 24V and supports frequencies from DC to 100kHz. The unit offers a response time of 1µs and maintains an accuracy of ±0.6% with linearity of ±0.1%. Operating temperatures span from -40°C to 70°C.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high precision and fast dynamic response for accurate current monitoring.
• Galvanic isolation separates the primary high-power circuit from the secondary low-voltage control circuitry.
• Bidirectional measurement capability allows detection of both positive and negative current flows.
• Single pass-through module design facilitates straightforward integration into power systems.

Current Sensors Applications

• Industrial motor drive systems requiring precise current feedback
• Uninterruptible power supplies (UPS) for load monitoring
• Welding equipment for arc current regulation
• Inverter and converter circuits in renewable energy systems

Current Sensors Procurement Notes

Verify the specific suffix SP26 against official LEM documentation to confirm pinout and mounting configuration compatibility. Ensure that the ±15V to 24V supply requirements align with existing system power rails. Confirm that the 500A nominal rating meets the peak load demands without exceeding the ±1480A measurement limit. Check for obsolescence status or alternative recommendations if the component is marked as not recommended for new designs.

Current Sensors Selection Notes

Select this model when high bandwidth up to 100kHz is required for pulsed current applications. The closed-loop architecture is suitable for environments demanding strict linearity and low offset errors. Consider the base-mount installation type and single-pass-through aperture size during mechanical layout planning. Validate thermal management capabilities given the operating temperature range and self-heating effects under continuous load conditions.

Current Sensors Part Context

This component belongs to the LF series of current transducers from LEM USA Inc., which are engineered for robust industrial performance. The LF 505-S variant specifically targets medium-to-high current applications where electrical isolation and measurement fidelity are critical. The SP26 suffix denotes a specific packaging or terminal configuration distinct from other variants in the same family.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult LEM USA Inc. directly for cross-reference data or updated product recommendations if this specific suffix is discontinued or unavailable.