LZSR 150-TP

Current Sensors Overview

The LZSR 150-TP is a closed-loop Hall effect current sensor manufactured by LEM USA Inc., designed for precise measurement of DC, AC, and pulsed currents with galvanic isolation. It features an integrated primary conductor for direct PCB soldering, eliminating the need for external busbars. The nominal primary current (IPN) is 150 A, with a peak measurement capability up to 270 A, which represents three times the nominal value. The device operates on a single +5 V power supply and provides a voltage output. It exhibits low offset drift of 3 ppm/K and includes an overcurrent detection output threshold set at 1.93 × IPN.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high accuracy and linearity with minimal offset drift.
• Integrated primary conductor allows for direct surface-mount soldering onto the printed circuit board.
• Includes dedicated pins for internal reference voltage and overcurrent detection output.
• High immunity to dv/dt interference suitable for demanding industrial environments.

Current Sensors Applications

• Solar inverters in the 70-120 kW range
• AC variable speed and servo motor drives
• Battery-powered applications
• Uninterruptible Power Supplies (UPS)
• Switch Mode Power Supplies (SMPS)

Current Sensors Procurement Notes

Verify the specific suffix 'TP' confirms the integrated primary conductor variant intended for PCB mounting. Ensure the ordering code matches the exact nominal current rating of 150 A. Confirm that the application environment supports the specified operating temperature range of -40°C to +85°C. Check for any required accessory kits or specific mounting hardware if not explicitly included in the standard package. Validate that the minimum CTI requirement of 100 is met by the end-use equipment PCB material.

Current Sensors Selection Notes

Select the LZSR 150-TP when a compact, board-mounted solution is required for currents up to 150 A nominal. Choose this model over the '-P' variant if avoiding external busbar integration is a priority. Consider the 270 A peak capacity for applications requiring temporary overload handling. Ensure the system design accommodates the single +5 V supply constraint and utilizes the available overcurrent detection pin for hardware-level protection strategies.

Current Sensors Part Context

The LZSR series expands LEM's single-supply current sensor range up to 450 A peak. This series is specifically engineered for solar applications and general industrial use. The TP designation distinguishes it from the P version by integrating the primary conductor directly into the sensor housing, facilitating easier assembly on printed wiring boards compared to models requiring separate hole mounting.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Direct replacement requires matching the closed-loop Hall effect topology, 150 A nominal rating, integrated primary conductor form factor, and +5 V single supply operation. Verify pin compatibility and thermal performance before substituting with other manufacturers' sensors.