The 7Semi ACS712 20A Hall Effect Current Sensor Module is a high-performance current sensing solution designed for accurate measurement of both AC and DC currents in modern electronic and industrial systems. Built around the industry-proven Allegro ACS712 Hall-effect current sensor IC, this module enables non-intrusive current monitoring with electrical isolation between the sensing circuitry and the measured load. Unlike traditional shunt resistor-based solutions, the ACS712 uses an integrated Hall-effect sensor to detect the magnetic field generated by current flow, resulting in lower power loss, improved safety, and enhanced reliability. The module supports bidirectional current measurement up to ±20A, making it suitable for a wide range of embedded, industrial, automotive, and energy monitoring applications.
The ACS712 sensor delivers a linear analog voltage output proportional to the measured current, allowing direct interfacing with Arduino, ESP32, STM32, Raspberry Pi ADC modules, PLCs, data acquisition systems, and custom microcontroller platforms. With a typical sensitivity of 100mV/A for the 20A variant and a low-noise analog signal path, the module provides precise real-time current measurements for monitoring motors, power supplies, battery systems, solar installations, inverters, chargers, and industrial control equipment. The integrated copper conduction path offers an extremely low resistance of approximately 1.2mΩ, minimizing insertion losses while maintaining accurate current sensing performance. Additionally, the sensor features factory calibration, stable offset voltage characteristics, and nearly zero magnetic hysteresis for dependable long-term operation.
This compact module is ideal for engineers, makers, researchers, students, and product developers working on energy management systems, smart home devices, robotics, electric vehicle subsystems, battery management systems, motor control platforms, and industrial automation projects. The ACS712 supports fast response times of approximately 5μs and bandwidths up to 80kHz, making it suitable for both steady-state and dynamic current monitoring applications. With built-in electrical isolation rated up to 2.1kVRMS between the sensing path and output circuitry, it provides an additional layer of protection in high-voltage systems. Combined with the 7Semi board design and an operating temperature range of -40°C to +80°C, this module delivers reliable performance in demanding environments.
Features
• Based on Allegro ACS712 Hall Effect Current Sensor IC
• Supports bidirectional AC and DC current measurement
• Measures current up to ±20A
• Hall-effect sensing technology provides galvanic isolation
• Typical sensitivity of 100mV/A for accurate current detection
• Low-noise analog output for stable measurements
• Fast 5μs response time for real-time monitoring applications
• Wide bandwidth up to 80kHz for dynamic current sensing
• Low internal conductor resistance of approximately 1.2mΩ
• Factory calibrated for improved accuracy and reliability
• Nearly zero magnetic hysteresis for consistent readings
• Electrical isolation up to 2.1kVRMS between current path and signal pins
• Compatible with Arduino, ESP32, STM32, Raspberry Pi, and PLC systems
• Suitable for motor monitoring, battery management, and power analysis
• Compact screw-terminal design for easy high-current connections
• Stable output characteristics over extended operating conditions
• Ideal for industrial automation and renewable energy applications
- Product Category:
- Hall effect sensor
- Sensor IC:
- ACS712ELC-20A
- Current Measurement Range:
- +-20A
- Sensitivity:
- 100mV/A
- Bandwidth:
- 80kHz
- Operating Temperature:
- -40°C to +85°C
- Dimension in mm:
- L=39mm W=23mm H=23.96mm
