• ACHS-7125 Current Sensor Carrier: from -50A to +50A

The Symbol : LANKON-045

This board is a simple carrier of Allegro's +- 50 A ACHS-7125 Hall effect-based linear current sensor with overcurrent fault output, which offers a low-resistance (~1.1 mΩ) current path and electrical isolation up to 100 V.

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A module with an ACHS-7125 current sensor operating based on the Hall effect, which allows for a minimum resistance of 0.7 mΩ and electrical insulation up to 3 kV. The sensor measures the current in the range from -50 A to 50 A. The output signal is an analog signal whose voltage corresponds to the measured current. A voltage of 2.5 V corresponds to a current of 0 A, and each change in this voltage by 40 mV corresponds to 1 A of the measured current. The sensor is designed to work with microcontrollers operating at 5 V.


  • Producer: Pololu
  • Manufacturer's number: ACHS-7125
  • Supply voltage: 4.5÷5.5 VDC
  • Measuring range: ±50 A
  • Electrical resistance: 0.7 mΩ
  • Electrical insulation: up to 3 kV
  • Current measurement sensitivity: 0.04 V/A
  • Interface: analog signal
  • Connection method: serial
  • Tolerance of current surges up to 100 A lasting no longer than 100 ms
  • Operating temperature: -40 ÷ +110°C
  • Dimensions: 17.8 x 20.3 mm
  • Weight: 1.5 g


  • Module with the ACHS-7125 system
  • goldpin connector
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