LF 305-S/SP7

Current Sensors Overview

The LF 305-S/SP7 is a closed-loop Hall effect current transducer designed for measuring DC, AC, and pulse currents with a nominal rating of 300 ARMS. It features galvanic isolation and a single pass-through aperture of 20.1 mm diameter. The device operates on a dual supply voltage ranging from +/- 12 V to +/- 20 V. Key electrical parameters include an accuracy of 0.5%, a secondary output signal of 150 mA instantaneous, and a measurement range of 500 A. The operational temperature span extends from -40°C to +85°C.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high precision and fast response time for accurate current detection.
• Galvanic isolation provides safety and noise immunity between primary and secondary circuits.
• Compact module design supports versatile panel mounting options for integration into various systems.

Current Sensors Applications

• Motor drives and control systems
• Power supply units and inverters
• Renewable energy generation equipment

Current Sensors Procurement Notes

Verify the specific suffix SP7 against official LEM documentation to confirm pinout configuration and mechanical tolerances. Ensure the dual supply voltage requirements match the target system's power architecture. Confirm that the chassis or panel mounting method aligns with the installation guidelines provided in the manufacturer datasheet to maintain structural integrity and thermal performance.

Current Sensors Selection Notes

Select this component when precise measurement of bidirectional AC and DC currents up to 300 ARMS is required. The closed-loop topology offers superior linearity compared to open-loop alternatives. Consider the 20.1 mm aperture size for conductor fitting. Verify that the operating environment stays within the specified -40°C to +85°C range and that the dual supply availability fits the design constraints.

Current Sensors Part Context

This model belongs to the LF305 series of current transducers manufactured by LEM USA Inc. The series is characterized by its robust construction and suitability for industrial applications requiring reliable current sensing. The LF 305-S variant specifically denotes the standard module version with defined mounting characteristics and electrical specifications consistent with the broader family design.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official LEM documentation for cross-reference data or updated product listings before considering alternative components.