Automotive Open Loop Current Sensors for xEV Market

Current Sensors with robust automotive qualified Hall element.

In open-loop sensors, the magnetic flux in the air gap of the magnetic core caused by the current is measured by a Hall probe. It generates an output voltage proportional to the flux. The conditioned voltage represents the output signal of the sensor.

VAC set up a new product line of open loop current sensors with a robust, automotive qualified hall element for high accuracy and linearity. They are ideally suited for the measurement of DC, AC, and pulsed currents in ranges of 300 A and 600 A.


  • Operating temperature -40 °C to 150 °C
  • Wide inner opening for cables and rectangular busbars of approx. ø 16 / 22 mm, resp. 4 x 21 / 6 x 26 mm
  • attractive pricing compared to closed-loop current sensors



Technical Data 

  • Accuracy of 2 % for nominal current and over the complete temperature range
  • Linearity of 1 % for nominal current and over the complete temperature range
  • Frequency range DC to 20 kHz
  • Galvanic isolation between primary conductor and measurement electronics rated up to 1,000 V 
  • Automotive qualified Hall-IC according to AEC-Q100
  • Manufacturing will be compliant to ”Technical Cleanliness” according VDA Volume 19

Typical Applications

  • High Voltage Electric Vehicles
  • 48 V Electric Vehicles
  • Hybrid Electric Vehicles

Standard Products

We designed four standard current sensors which are available in sample quantities. The following table shows prelimary data which has to be confirmed after first article production. If you like to get samples for testing, please contact us directly, using the contact form below. 

Preliminary part no. Primary nominal current Primary peak current Prototype designation Connection
K30549 300 425 300 HP horizontal / pins
K30553 600 850 600 HP horizontal / pins
K30554 600 850 600 VP vertical / pins
K30555 600 850 600V vertical, w/o pins for screw connection


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