ACS712 Current Sensor Module

The ACS712 Current Sensor Module is a versatile, high-precision Hall-effect–based sensor that measures both AC and DC currents. Designed for seamless integration with Arduino, Raspberry Pi, ESP32, and other microcontrollers, it outputs a proportional analog voltage that represents the current flowing through the onboard conductor.

Available in 5 A, 20 A, and 30 A versions, this module is perfect for energy monitoring, motor control, battery management, and industrial automation.

🔹 Key Features

• Multiple Range Options: Choose from 5 A, 20 A, or 30 A modules for different current requirements.

• AC & DC Current Sensing: Accurate measurement of alternating and direct currents.

• Hall-Effect Technology: Provides electrical isolation for safety and noise immunity.

• Analog Voltage Output: Linear output proportional to sensed current for easy ADC interfacing.

• High Sensitivity: Typical 185 mV/A (5 A), 100 mV/A (20 A), 66 mV/A (30 A).

• Compact PCB Design: Ready to use with onboard terminal block and pin header.

🔹 Technical Specifications

• Operating Voltage: 4.5 V – 5.5 V DC

• Current Ranges: ±5 A / ±20 A / ±30 A (variant dependent)

• Output Type: Analog voltage, centered at Vcc/2 (approx. 2.5 V at 0 A)

• Sensitivity: 185 mV/A (5 A), 100 mV/A (20 A), 66 mV/A (30 A)

• Response Time: <5 µs

• Bandwidth: 80 kHz

• Dimensions: ~31 mm × 13 mm (varies slightly by module)

• Operating Temperature: –40 °C to +85 °C

🔹 Applications & Use Cases

• Arduino & Raspberry Pi Power Monitoring: Track AC or DC current consumption in real time.

• Solar & Battery Systems: Measure charging and discharging currents safely.

• Motor Control: Detect overloads or monitor performance in robotics.

• Industrial Automation: Continuous current sensing for equipment diagnostics.

• Home Energy Management: Integrate into IoT dashboards for smart energy tracking.

🔹 Advantages for Makers & Engineers

• Full compatibility with Arduino boards and Raspberry Pi ADCs.

• Works alongside other Electronics Components like relays, MOSFETs, and motor drivers.

• Simple wiring with built-in screw terminals and 3-pin header.

🔹 Safety & Precautions

• Ensure the current range of the chosen module (5 A/20 A/30 A) matches your application to avoid saturation.

• Isolate high-voltage AC circuits properly when monitoring mains current.

• Use a regulated Power Supply for stable readings.

• Avoid exceeding maximum current ratings to prevent overheating.

🔗 Helpful Internal Links

• Explore more Electronics Components for power and energy projects.

• Pair with Tools and Accessories for safe installation and testing.

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The ACS712 Current Sensor Module provides accurate, isolated AC/DC current measurement with analog output, available in 5 A, 20 A, and 30 A ranges. Ideal for Arduino, Raspberry Pi, solar energy systems, robotics, and industrial monitoring applications.