ACS712 20A Current Sensor Module

The ACS712 20A Range Current Sensor Module is a Hall-effect based current sensing module designed to measure AC and DC current up to ±20A. It converts the detected current flow into a proportional analog voltage output, allowing microcontrollers such as Arduino, ESP32, Raspberry Pi, and STM32 to monitor electrical current in real time.

Based on the ACS712-20A current sensor IC, this module provides electrical isolation between the high-current path and the control circuit, making it suitable for applications requiring safe current monitoring. It is commonly used in battery monitoring systems, motor control, solar energy projects, power supplies, robotics, and IoT energy monitoring applications.

The module provides an analog output signal with a sensitivity of approximately 100mV/A, with the output voltage centered around 2.5V when no current is flowing. This makes it easy to interface with the analog input pins of most microcontroller boards.

Features
Hall-effect based current measurement
Measures both AC and DC current
Current range: -20A to +20A
Analog voltage output proportional to current
Electrical isolation between current path and control circuit
Operating voltage: 4.5V–5.5V DC
Sensitivity: 100mV/A
Low resistance current path
Compact PCB design
Easy connection with Arduino and other microcontrollers

Applications
Arduino current monitoring projects
Battery charging and protection systems
Solar power monitoring
DC motor current measurement
Robotics projects
Electric vehicle systems
Power supply monitoring
Smart energy meters
IoT energy monitoring devices
DIY electronics projects
Compatible With
Arduino Uno
Arduino Nano
Arduino Mega
ESP32
ESP8266
Raspberry Pi
STM32
Other microcontrollers with analog input

Technical Specifications
Sensor IC: ACS712-20A
Measurement Range: -20A to +20A
Supply Voltage: 5V DC
Output Type: Analog voltage
Sensitivity: 100mV/A
Zero Current Output: Approximately 2.5V
Sensing Method: Hall Effect
Interface Pins: VCC, GND, OUT
Current Terminals: Screw terminal input/output
Isolation Voltage: High-voltage isolation between sensing and control sections

Package Includes
1 × ACS712 20A Current Sensor Module