Current Sensor Module – ACS712 Hall Effect Sensor for Arduino and IoT Projects
The Current Sensor Module (ACS712) is a precision Hall-effect-based sensor that accurately measures AC and DC currents. Designed for real-time current monitoring, power usage tracking, and overcurrent protection systems, it’s fully compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers.
Available in 5A, 20A, and 30A versions, this sensor offers high accuracy and isolation, making it ideal for DIY energy meters, robotics, and smart power systems.
 
Key Features:
AC and DC Current Sensing: Measures both types of currents using Hall-effect technology
Multiple Ranges Available: Choose from 5A, 20A, or 30A models based on project requirements
Analog Output: Provides voltage proportional to current sensed
High Accuracy & Isolation: Galvanic isolation between the current-carrying wire and microcontroller
Easy Integration: 3-pin interface (VCC, GND, OUT) for plug-and-play setup
 
Applications:
Battery charge/discharge current monitoring
Solar panel and inverter current tracking
DIY energy consumption meters
Overcurrent detection and protection systems
IoT-based power monitoring and load sensing
Motor current feedback in robotics
 
Package Includes:
1 × Current Sensor Module (ACS712 – 5A / 20A / 30A)
 
Specifications:
Sensor Type: ACS712 Hall Effect Sensor
Measurement Range: ±5A / ±20A / ±30A (depending on model)
Output Type: Analog voltage proportional to current
Operating Voltage: 5V DC
Sensitivity:
– 185 mV/A (5A model)
– 100 mV/A (20A model)
– 66 mV/A (30A model)
Galvanic Isolation: Yes (up to 2100V RMS isolation voltage)
Response Time: < 5 µs
 
Dimensions:
Length: 31 mm
Width: 13 mm
Height: 12 mm
 
Weight: 3 g
 
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