ACS758 Current Sensor ACS758LCB 100B PFF-T Module

The ACS758LCB-100B PFF-T Current Sensor Module is a high-precision Hall-effect current sensor capable of measuring up to ±100A of AC or DC current. Designed for industrial automation, power management, and motor control systems, it offers high accuracy, low noise output, and galvanic isolation between the primary circuit and signal output.

ACS758 Current Sensor Module (Model: ACS758LCB-100B PFF-T)

The ACS758 Current Sensor Module (Model: ACS758LCB-100B PFF-T) is a linear Hall-effect–based sensor designed to measure high current with high accuracy and electrical isolation. Using Allegro’s advanced Hall-effect technology, this module converts current through a conductor into a proportional voltage output, allowing precise current monitoring for Arduino, Raspberry Pi, or industrial systems.

With a measurement range of ±100A, this sensor is ideal for DC motor drives, inverters, power supplies, battery monitoring, and energy metering applications. The onboard low-noise amplifier ensures clean signal output for microcontrollers and data acquisition systems.


⚙️ Key Features & Highlights:

  • High Current Range: Measures up to ±100A (bidirectional).

  • 🔒 Galvanic Isolation: Provides complete electrical isolation between input and output.

  • 🎯 Accurate and Stable: Typical sensitivity of 40 mV/A with low offset error.

  • 🧠 Linear Hall Effect Technology: Delivers proportional voltage output for real-time current sensing.

  • 🌡️ Wide Operating Temperature: Works reliably from -20°C to +85°C.

  • 🔧 Compact Design: Easy integration into power circuits and Arduino projects.

  • 🔋 Low Power Consumption: Ideal for embedded and portable systems.

  • 🔗 Compatible with: Arduino Boards, Raspberry Pi, and other microcontroller platforms.


⚙️ Technical Specifications:

Parameter Specification
Model ACS758LCB-100B PFF-T
Sensor Type Hall Effect Linear Current Sensor
Current Range ±100A
Supply Voltage (VCC) 3.0V – 5.5V DC
Output Type Analog (proportional to current)
Sensitivity 40 mV/A (typical)
Output Voltage at 0A ~2.5V (Vcc/2)
Response Time <5 µs
Bandwidth 120 kHz
Isolation Voltage 3 kVrms
Operating Temperature -20°C to +85°C
Mounting Style PCB Through-Hole
Package Type PFF-T
Dimensions 19.8 × 14.7 × 5.5 mm

⚙️ Working Principle:

The ACS758 sensor operates using the Hall effect, detecting the magnetic field generated by current flowing through a conductor. The Hall element produces a voltage proportional to the magnetic field, which corresponds to the current magnitude. This voltage is then amplified and output as a linear analog signal for precise current measurement — ensuring safe and isolated sensing in both AC and DC systems.


⚙️ Applications:

  • 🔋 Battery Management Systems (BMS)

  • ⚙️ DC/AC Motor Control and Drives

  • 🔌 Power Supply and Inverter Monitoring

  • 💡 Solar Energy Systems and Load Monitoring

  • 🚗 Automotive Current Sensing

  • 🧠 IoT Energy Monitoring Projects

  • 🔧 DIY & Industrial Automation Systems

For projects involving current sensing and control, this module pairs perfectly with Electronics Components and Arduino and Accessories categories available at Electroway.


⚙️ Precautions:

  • ⚠️ Ensure proper polarity connection (VCC, GND, OUT).

  • ⚠️ Avoid overcurrent beyond ±100A limit.

  • ⚠️ Mount the sensor securely to reduce vibration interference.

  • ⚠️ Use a stable 5V power supply for accurate readings.

  • ⚠️ Calibrate in software if precise offset correction is needed.


▶️ YouTube Tutorial Video:

Watch: How to Use ACS758 Current Sensor with Arduino


🔹 Internal Links:


🔹 Product Summary:

The ACS758LCB-100B PFF-T Current Sensor Module delivers industrial-grade accuracy and isolation for high-current applications. Its Hall-effect sensing, ±100A range, and fast response make it ideal for power systems, robotics, and energy monitoring. With seamless integration into Arduino and Raspberry Pi environments, it’s a versatile choice for both DIY makers and engineers.

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