HW-525 (ACS758) Hall Effect Linear Current Sensor

The HW-525 (ACS758) Hall Effect Linear Current Sensor is a high-performance current detection module designed for accurate, isolated current measurement in power electronics, energy systems, and embedded projects.

This module uses the ACS758 sensor IC from Allegro Microsystems, which provides a linear analog voltage output proportional to the measured current. It can sense bidirectional currents (AC/DC) up to ±50A, ±100A, or ±200A, depending on the variant, while maintaining excellent accuracy, low offset voltage, and temperature stability.

The HW-525 sensor features built-in galvanic isolation between the input current path and the output signal, ensuring safety in high-voltage systems. The 5V operating voltage and analog output compatibility make it easy to interface with Arduino, Raspberry Pi, and other microcontroller platforms for real-time current monitoring, protection, and feedback control applications.

Its compact module design, screw terminal connectors, and high sensitivity make it an essential tool in solar inverters, motor drivers, battery chargers, and IoT-based energy monitoring systems.

🔧 Technical Specifications:

💡 Key Features:

• ✅ Accurate AC/DC current measurement up to ±200A

• ✅ Galvanic isolation ensures electrical safety

• ✅ Linear analog voltage output for precise monitoring

• ✅ Fast response time and high signal bandwidth

• ✅ Works with Arduino, Raspberry Pi, and ESP32

• ✅ Compact, robust design with onboard terminal blocks

• ✅ Ideal for battery management, motor control, and solar power systems

• ✅ Supports bidirectional current sensing

⚙️ Applications:

• 🔋 Battery management systems (BMS)

• ⚙️ Motor drivers and controllers

• ⚡ Power supply monitoring and protection

• ☀️ Solar energy and inverter systems

• 💡 Industrial automation equipment

• 🧭 Arduino and IoT current sensing projects

• 🔧 Overcurrent detection and load analysis

⚠️ Precautions:

• Ensure proper heat dissipation for high current applications.

• Avoid exceeding the rated current limit to prevent sensor damage.

• Maintain secure and tight wire connections.

• Always handle the module with power off during installation.

• Do not expose to moisture or extreme environmental conditions.

🎥 Tutorial & Resources:

📺 YouTube Tutorial: How to Use ACS758 Current Sensor with Arduino
📘 Datasheet: Allegro ACS758 Datasheet (PDF)

🔗 Internal Links:

• Explore Electronics Components

• Browse Arduino and Accessories

• Check Power Supply Modules

• See Sensor Modules

🧩 Product Summary:

The HW-525 ACS758 Hall Effect Linear Current Sensor is a reliable, isolated, and high-accuracy module for bidirectional AC/DC current measurement. Supporting up to 200A and offering fast response with linear analog output, it’s perfect for Arduino-based projects, industrial monitoring, and energy systems.