Current sensor HAH3DR S07/SP42 from Lem

Electric mobility: Lem’s current sensor is designed for 800 V power modules

  • Lem, a specialist in electrical parameter measurement solutions for industrial and automotive applications, offers the HAH3DR S07/SP42 sensor for current measurement in 800 V three-phase power modules.

Developers of automotive traction inverters are increasingly using three-phase power modules such as Infineon’s Hybridpack Drive. These modules now adopt Mosfet SiC technology, enabling vehicles to use 800 V battery systems offering a faster charging process and longer driving range.

The HAH3DR S07/SP42 three-phase transducer has been designed to integrate with these 800 V power modules. It offers a wide range of current measurement ranges, from 700 A to 1200 A. In addition, compared with existing HAH3DR family transducers, the insulation characteristics of the housing have been improved to better meet the requirements of 800 V batteries.

This transducer features an aperture dimensioned to fit busbars with a maximum thickness of 1.5 mm. It is therefore compatible with the latest generation of power supply modules, as well as those designed by other suppliers, such as ST Microelectronics’ Acepak Drive, On Semi’s SSDC, Starpower and CRRC.

The HAH3DR S07/SP42 is backwards compatible with the first generation of HAH3DR S07/SP4 400 V inverters. This eliminates the need to make any system modifications in order to use this new component.

This quality-controlled current sensor is suitable for safety applications requiring ISO 26262 compliance under special conditions, and for which Lem can provide a safety certificate enabling customers to achieve Automotive Safety Integrity Level (ASIL) D at inverter level.