ACS71240KEXBLT-030B5

Current Sensors Overview

The ACS71240KEXBLT-030B5 is an automotive-grade, galvanically isolated current sensor IC from Allegro MicroSystems. It utilizes Hall effect technology to measure AC/DC currents up to 30A in a single channel. The device features common-mode field rejection and overcurrent detection capabilities. It operates within a supply voltage range of 3V to 3.6V with a maximum supply current of 12mA. The sensor provides a voltage output with a sensitivity of 132mV/A. It supports bidirectional current measurement and offers a frequency response of 120kHz. The unit is housed in a 12-PowerWFQFN package.

Current Sensors Feature Summary

• Galvanic isolation between the high-current path and the signal processing circuitry
• Integrated overcurrent detection functionality for system protection
• Common-mode field rejection to minimize interference from external magnetic fields
• Automotive-grade reliability compliant with AEC-Q100 standards

Current Sensors Applications

• Automotive battery management systems
• Electric vehicle powertrain control units
• On-board charger monitoring circuits
• High-side or low-side current sensing in automotive inverters

Current Sensors Procurement Notes

Verify the specific suffix B5 against the manufacturer's official datasheet to confirm pinout compatibility and functional specifications. Ensure that the ordering part number matches the required current rating and package variant. Cross-reference the component marking with the official Allegro MicroSystems documentation to prevent counterfeit substitution. Confirm that the supplier provides valid traceability records for automotive-grade components.

Current Sensors Selection Notes

Select this component when galvanic isolation and high immunity to external magnetic fields are required in automotive environments. The integrated overcurrent detection simplifies protection circuit design compared to standard Hall sensors. Consider the 12-PowerWFQFN package for applications requiring a small footprint and thermal efficiency. Verify that the 30A current rating aligns with the peak load requirements of the target application.

Current Sensors Part Context

This part belongs to the ACS71240 series of automotive current sensors. The series is designed for high-reliability applications in electric and hybrid vehicles. It distinguishes itself by combining current sensing with overcurrent detection in a compact form factor. The KEXBLT suffix indicates a specific tape and reel packaging configuration suitable for automated surface-mount assembly processes.

Current Sensors Replacement Considerations

Direct replacements must match the 12-PowerWFQFN package and 30A rating. Check for equivalent parts from Allegro such as the ACS71240LLCBTR-030B3 if lead-free soldering requirements differ. Verify that any substitute maintains the same galvanic isolation voltage and AEC-Q100 qualification status.