ACS712 20A Range Current Sensor Module


20A Range Current Sensor Module ACS712 consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. 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 an 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 the analog I / O port of Arduino. There are also the 30A and 5A versions for your choice available on our portal.


  • Pin 5V power supply, onboard power indicator.
  • 100 mV/A output sensitivity
  • 5.0 V, single supply operation
  • Output voltage proportional to AC or DC currents
  • Factory-trimmed for accuracy
  • Extremely stable output offset voltage
  • There is no detection current through, the output voltage is VCC / 2.
  • The module can be measured plus or minus 20 amps, corresponding to the analog output of 185 mV/A


Pin NumberPin NameDescription
1VccInput voltage is +5V for typical applications
2OutputOutputs Analog voltage proportional to current
3GroundConnected to the ground of the circuit
T1Wire InThe wire through current has to be measured and is connected here 
T2Wire Out


Module Dimensions31 x 13 x 14 mm (LxWxH)
Weight3 gm
Supply Voltage4.5V~5.5V DC
Measure Current Range-20A~ 20A
The current sensor chipsACS712_ELC-20A


  • Monitoring and controlling power consumption in high-current industrial equipment.
  • Current sensing and protection in electric vehicle charging stations for high-power charging.
  • Current measurement in heavy machinery and equipment for performance analysis and maintenance.


Download Datasheet for ACS712 20A Range Current Sensor Module from the link given below.