LF 505-S/SP9

Current Sensors Overview

The LF 505-S/SP9 is a closed-loop Hall effect current sensor manufactured by LEM USA Inc. It features a nominal primary current of 500A and a measuring range of ±1480A. The device operates with a supply voltage of ±15V to 24V and delivers an output current signal. It supports AC, DC, and pulsed current measurements with galvanic isolation. Key electrical parameters include a frequency response of DC to 100kHz, linearity of ±0.1%, accuracy of ±0.6%, and a response time of 1µs. The unit is designed for base mounting within an operating temperature range of -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 between the primary circuit and secondary electronics provides safety and noise immunity.
• Bidirectional measurement capability allows detection of both positive and negative current flows.

Current Sensors Applications

• Industrial motor drive systems
• Power supply units
• Inverter and converter circuits

Current Sensors Procurement Notes

Verify the specific suffix SP9 against official LEM documentation to confirm pinout and mechanical compatibility. Check component status as some variants may be marked not recommended for new designs. Ensure supply voltage requirements match system constraints before integration.

Current Sensors Selection Notes

Select this model when high bandwidth up to 100kHz is required for transient analysis. The ±1480A measuring range accommodates peak currents significantly higher than the 500A nominal rating. Consider the single-pass-through module design for panel mounting applications requiring compact form factors.

Current Sensors Part Context

This component belongs to the LF series of closed-loop Hall effect transducers from LEM. These sensors are engineered for electronic measurement of various current types including DC, AC, and pulsed signals. The series emphasizes compact design and reliable performance in demanding industrial environments.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult LEM technical support for direct replacements or updated series equivalents.