LA 305-S/SP19

Current Sensors Overview

The LEM LA 305-S/SP19 is a high-precision closed-loop Hall-effect current transducer designed for accurate primary current measurement. It features a nominal primary current (Ipn) of 500 A and utilizes a split-core design for non-invasive installation around conductors. The device provides an isolated secondary output signal proportional to the measured current, ensuring electrical safety between the primary circuit and control electronics. Operating within a temperature range of -40°C to +85°C, it delivers reliable performance in demanding industrial environments while maintaining high linearity and bandwidth characteristics typical of closed-loop technology.

Current Sensors Feature Summary

• Closed-loop Hall-effect technology ensures high accuracy and fast dynamic response
• Split-core construction allows for easy installation without disconnecting the primary conductor
• Galvanic isolation between primary and secondary circuits enhances system safety
• Wide operating temperature range supports deployment in harsh industrial conditions

Current Sensors Applications

• Industrial motor drive systems for precise current monitoring
• Power supply units requiring accurate feedback control
• Inverter and converter applications in renewable energy systems
• Battery management systems in electric vehicles and storage solutions

Current Sensors Procurement Notes

Verify that the specific suffix SP19 corresponds to the required packaging and terminal configuration as defined by LEM USA Inc. Ensure compatibility with existing mounting hardware and conductor sizes. Confirm that the procurement channel provides original manufacturer documentation to validate authenticity and technical specifications against the official datasheet.

Current Sensors Selection Notes

Select this model when a 500 A nominal current rating is required for split-core applications. Consider the closed-loop architecture for superior linearity compared to open-loop alternatives. Evaluate the physical dimensions and split-core opening size to ensure fitment around the target busbar or cable. Verify that the output signal type matches the input requirements of the downstream measurement or control interface.

Current Sensors Part Context

The LA 305-S/SP19 belongs to the LEM LA series of current transducers, which are widely used in power electronics. This series is characterized by its robust construction and high reliability. The LA 305 variant specifically targets medium-to-high current applications, offering a balance between precision and mechanical ease of use through its split-core design, distinguishing it from fixed-core models in the same family.

Current Sensors Replacement Considerations

Direct replacements must match the 500 A nominal current rating and split-core form factor. Check for equivalent part numbers within the LA series or other LEM lines that offer identical pinout and electrical characteristics. Ensure any substitute maintains the same isolation voltage ratings and temperature performance specifications.