ACS712 20A Current Sensor Module

Overview

The ACS712 20A Current Sensor Module is a reliable Hall-effect–based sensor designed for precise measurement of AC and DC currents up to ±20A. It provides complete electrical isolation between the current-carrying conductor and the low-voltage output, ensuring safe operation in power monitoring and control applications.

This module produces a linear analog voltage output proportional to the measured current, making it easy to interface with Arduino, ESP32, ESP8266, Raspberry Pi (with ADC), and other microcontrollers. Its fast response time and compact PCB design make it suitable for both prototyping and deployed systems.

Key Features

• Measures AC and DC current up to ±20A

• Hall-effect sensing with built-in electrical isolation

• Linear analog voltage output

• Fast response and low noise

• Compact, easy-to-mount module

• Ideal for embedded systems and IoT projects

Electrical Specifications

• Sensor type: ACS712-20A

• Current range: ±20A

• Operating voltage: 5V DC

• Sensitivity: 100 mV/A

• Output voltage: Vcc/2 at 0A

• Isolation voltage: Up to 2.1 kV RMS

• Operating temperature: −40°C to +85°C

Typical Applications

• Power and energy monitoring

• Solar and inverter systems

• Battery management systems

• Motor and load current sensing

• Overcurrent protection circuits

• Arduino and IoT-based projects

The ACS712 20A Current Sensor Module delivers accurate, safe, and stable current measurement, making it a dependable choice for engineers, students, and electronics hobbyists.