ACS712 20A Range Current Sensor Module

The ACS712 20A Range Current Sensor Module measures AC or DC current up to ±20 A with the ACS712 Hall-effect sensor chip. The current flows through the chip's internal copper path, which is electrically isolated from the signal pins, and the module gives an analog voltage proportional to the current. It is a simple way to monitor motors, batteries, solar panels and power supplies with an Arduino or ESP32.

ACS712 20A Range Current Sensor Module Specifications

• Sensor chip: ACS712, 20 A version
• Measuring range: ±20 A, AC or DC
• Sensitivity: 100 mV/A
• Zero-current output: about half the supply (2.5 V at 5 V)
• Supply voltage: 5 V
• Bandwidth: 80 kHz
• Isolation: 2.1 kV RMS between the current path and the signal pins
• Current path resistance: about 1.2 mΩ
• Connections: screw terminal for the measured current; VCC, OUT and GND pins

ACS712 20A Range Current Sensor Module Applications

• Measuring motor current and detecting stalls
• Battery charge and discharge monitoring
• Solar panel and inverter power logging
• Overcurrent protection and power monitoring in DIY projects

What's in the Box

• 1 × ACS712 20 A current sensor module

Tip: Put the screw terminal in series with the load and read OUT on an analog pin: current (A) = (Vout − 2.5 V) / 0.100. With an ESP32 or another 3.3 V board, add a voltage divider on OUT, because it can rise above 3.3 V. Take care with mains voltage and keep the high-current side fully insulated and fused.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.