ACS712 Current Sensor Module 5A 20A 30A AC DC Arduino

⚡ ACS712 Hall Effect Current Sensor Module 5A 20A 30A AC/DC | AuscomTech

The ACS712 Current Sensor Module is a reliable, non-intrusive current sensing solution designed for accurate AC and DC current measurement in electronics, energy monitoring, and automation projects.

Available in 5A, 20A, and 30A variants, this module uses Hall effect sensing to measure current flow without inserting resistance into the circuit, making it ideal for Arduino, Raspberry Pi, and microcontroller-based power monitoring applications.

⭐ Key Features

🧲 Hall Effect Current Sensing
Provides isolated, low-loss measurement of AC and DC current without direct electrical contact.

📏 Multiple Current Ranges Available
Choose the correct variant for your application: 5A, 20A, or 30A.

🔁 Bidirectional Measurement
Supports both positive and negative current flow for versatile monitoring.

📊 Analog Voltage Output
Linear voltage output proportional to current for easy ADC reading by microcontrollers.

⚡ Stable Zero-Current Output
Output voltage remains centred at VCC / 2 when no current is flowing.

🔌 Microcontroller Friendly
Designed for seamless integration with Arduino, Raspberry Pi (via ADC), ESP32, STM32, and similar platforms.

💡 Onboard Power Indicator LED
Provides visual confirmation that the module is powered and operating.

📊 Technical Specifications

Sensor IC: ACS712
Supply Voltage: 5V DC
Measurement Type: AC & DC current
Isolation: Hall effect (electrically isolated)

5A Module:
• Sensitivity: 185 mV/A
• PCB Size: 31 × 13 mm

20A Module:
• Sensitivity: 100 mV/A
• PCB Size: 27.4 × 11.8 mm

30A Module:
• Sensitivity: 66 mV/A
• PCB Size: 31 × 13 mm

Zero Current Output: VCC / 2
Output Type: Analog voltage
Response Time: <5 µs

⚠️ Important Notes

• Output is analog — requires ADC input on the controller
• Raspberry Pi requires an external ADC module
• Terminal block colour may vary (blue or green)
• Proper calibration improves accuracy, especially at low currents

🧩 Compatible With

• Arduino Uno / Mega / Nano
• Raspberry Pi (with ADC)
• ESP32 / ESP8266
• STM32 microcontrollers
• PLC analog input systems
• Energy monitoring systems

⚙️ Typical Applications

• AC/DC power monitoring
• Solar and battery management systems
• Motor current sensing
• Smart energy meters
• Overcurrent detection
• Robotics and automation
• IoT power measurement

📦 Package Includes

• 1 × ACS712 Current Sensor Module (5A, 20A, or 30A – select variant)