GY-471 3A Range MAX471 Current Sensor Module

GY-471 3A Range MAX471 Current Sensor Module

The GY-471 MAX471 Current Sensor Module is a high-precision, bidirectional high-side current-sense amplifier designed for accurate current monitoring in DC and battery-powered systems. Built around the MAX471 IC, it integrates a 35mΩ precision sense resistor, enabling accurate current measurement up to ±3A without disturbing the ground path.

This module is ideal for applications such as battery management, power supply monitoring, and DC motor control, where efficient and reliable current measurement is essential. It features an open-collector SIGN output to indicate current direction, allowing users to monitor charging and discharging states effectively.

Operating across a wide voltage range of 3V to 36V, the GY-471 module consumes less than 100µA during operation and includes a low-power shutdown mode for energy-sensitive designs.

Key Features

• Complete high-side current sensing

• Integrated 35mΩ precision sense resistor (MAX471)

• Measures up to ±3A current

• 2% accuracy across temperature range

• Monitors both charging and discharging current

• Low power consumption: 100µA typical

• 18µA maximum shutdown mode

• Wide supply voltage range: 3V to 36V

• Compact 8-pin DIP/SO package design

• Compatible with Arduino, ESP32, and other microcontrollers

Applications

• Battery and power supply monitoring

• DC motor current sensing

• Portable electronics and smart battery systems

• Robotics and automation

• Electronic test and measurement projects

• IoT and embedded energy management systems

Package Includes

• 1 x Unsoldered GY-471 3A Range MAX471 Current Sensor Module

Product Highlights

The GY-471 MAX471 module provides accurate, bidirectional current measurement without affecting the ground path—ideal for portable, battery-powered, and embedded applications. Its compact size, wide voltage range, and built-in precision resistor make it a versatile and reliable current-sensing solution for hobbyists and professionals alike.