ACS71240KEXBLT-050U5

Current Sensors Overview

The ACS71240KEXBLT-050U5 is an automotive-grade, galvanically isolated current sensor IC from Allegro MicroSystems. It utilizes Hall effect technology to measure AC and DC currents with a maximum sensing range of 50A. The device features a voltage output with a sensitivity of 80mV/A and operates within a supply voltage range of 3V to 3.6V. Key electrical specifications include a bandwidth frequency of 120kHz, linearity of ±1%, and accuracy of ±6%. The component has a response time of 4µs and draws a maximum supply current of 12mA. It is housed in a 12-PowerWFQFN package (12-QFN 3x3) with surface mount installation and wettable flanks.

Current Sensors Feature Summary

• Galvanic isolation between the high-current path and the electronic circuit for enhanced safety
• Integrated overcurrent fault detection capability for system protection
• Common mode rejection to minimize interference from external magnetic fields

Current Sensors Applications

• Automotive battery management systems
• Motor control applications
• Power supply monitoring

Current Sensors Procurement Notes

Verify the specific suffix U5 against official datasheets to confirm the 50A rating and sensitivity parameters. Ensure the procurement source provides valid traceability documentation required for automotive-grade components. Confirm that the 12-PowerWFQFN package dimensions match the target PCB footprint design requirements before finalizing orders.

Current Sensors Selection Notes

Select this component when a 50A sensing range is required alongside integrated fault protection features. The 80mV/A sensitivity offers a balance between signal resolution and noise immunity compared to higher sensitivity variants. Consider the 120kHz bandwidth for applications requiring moderate-speed dynamic current measurements without excessive filtering overhead.

Current Sensors Part Context

This part belongs to the ACS71240 series, which represents Allegro's advanced generation of isolated current sensors. Unlike earlier generations, this series integrates additional diagnostic features such as overcurrent fault outputs. The KEXBLT designation indicates specific packaging and temperature grade configurations within the broader product family.

Current Sensors Replacement Considerations

Direct replacements must maintain the 12-PowerWFQFN package and 50A rating. Verify compatibility with existing fault logic circuits if substituting with other series members.