LT 4000-T

Current Sensors Overview

The LT 4000-T is a closed-loop compensated current transducer utilizing Hall effect technology for the electronic measurement of DC, AC, and pulsed currents. It provides galvanic isolation between high-power primary circuits and secondary electronic circuits. The device features an insulated plastic case recognized according to UL 94-V0 standards. Key electrical characteristics include a primary nominal current of 4000 A and a secondary rated signal output of 20 mA. It supports a wide frequency bandwidth and offers high immunity to external interference with no insertion losses.

Current Sensors Feature Summary

• Closed-loop compensation using Hall effect technology for precise current measurement
• Galvanic isolation between primary high-power and secondary low-power circuits
• Insulated plastic housing meeting UL 94-V0 safety recognition standards

Current Sensors Applications

• AC variable speed drives and servo motor drives
• Static converters for DC motor drives
• Uninterruptible Power Supplies (UPS)
• Switched Mode Power Supplies (SMPS)

Current Sensors Procurement Notes

Verify the specific suffix designation against official LEM documentation to confirm mechanical interface variations or mounting configurations. Ensure the selected variant matches the required insulation voltage and thermal management specifications for the target application environment. Cross-reference part numbers with authorized distributors to confirm authenticity and traceability.

Current Sensors Selection Notes

Select this component for applications requiring high-current measurement with strict galvanic isolation needs. Consider the 4000 A primary rating and 20 mA secondary output when designing signal conditioning circuits. Evaluate the closed-loop architecture benefits regarding linearity and temperature drift compared to open-loop alternatives for precision industrial control systems.

Current Sensors Part Context

This model belongs to the LT series of current sensors manufactured by LEM USA Inc., designed for industrial and railway applications. The series utilizes closed-loop Hall effect technology to deliver rapid response times and dual power supply capabilities. These sensors are engineered for accuracy in demanding environments involving static converters and power electronics.

Current Sensors Replacement Considerations

LT 4000-S is a similar current transducer within the same product family offering comparable Hall effect performance.