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We have ✅ 5 available of the EC-SEL71220A in our Sydney warehouse. An extra 100 units will be available shortly.

Express post delivery (2-5 business days)

Sensing and controlling current flow is a fundamental requirement in a wide variety of applications including, over-current protection circuits, battery chargers, switching mode power supplies, digital watt meters, programmable current sources, etc. This ACS721 current module is based on ACS712 sensor, which can accurately detect AC or DC current. The maximum AC or DC that can be detected can reach 20A, and the present current signal can be read via analog I / O port of Arduino. There are also the 5A and 30A version for your choice.


  • Supply Voltage: 4.5V~5.5V DC
  • Measure Current Range: -20A~ 20A
  • Sensitivity: 100mV/A

External Link & Download

ACS712 Datasheet

ACS712 Arduino Program

Useful Introduction_1 from embedded-lab.

Useful Introduction_2 from embedded-lab.

The ACS712 Current Sensor- 20A appears in the following collections: