UGN3144 Hall Effect Sensor Switch 🧲

The UGN3144 Hall Effect Sensor is a reliable, long‑life magnetic field detection device ideal for position and speed sensing. With high sensitivity, precise switching, and a wide operating voltage range, it integrates seamlessly into Arduino, Raspberry Pi, and other microcontroller projects, as well as industrial electronics components and modules.
UGN3144 unipolar Hall‑effect switch in a TO‑92 through‑hole package

Key Features ⭐

• High sensitivity for dependable magnetic field detection and repeatable switching.
• Wide supply range: operates from 4.5 V to 24 V DC for flexible system design.
• Digital open‑collector output (sink up to 25 mA) for easy interfacing with TTL/CMOS logic.
• Robust TO‑92 package suitable for through‑hole assembly and field installations.
• Reliable performance across an operating temperature range of −20°C to +85°C.
• Microcontroller‑friendly: simple integration with Arduino, Raspberry Pi, and embedded systems using a pull‑up resistor.

Technical Specifications 📐

• Sensor type: Unipolar Hall‑effect switch (digital)
• Operating voltage: 4.5 V to 24 V DC
• Output current: up to 25 mA (open‑collector, sink)
• Operating temperature: −20°C to +85°C
• Package: TO‑92 (through‑hole)

Typical Applications 🔧

• Industrial automation 🤖: Robotics, proximity sensing, end‑stop detection, and conveyor speed/position sensing.
• Automotive 🚗: Wheel or shaft speed sensing and position detection in systems such as speedometers. Note: Not intended for safety‑critical use (e.g., certified ABS) without appropriate qualification.
• Consumer electronics 📱: Lid/cover detection, magnetic switches, and accessory presence detection.

Integration Tips for Arduino & Raspberry Pi 🧩

• Use a pull‑up resistor (e.g., 4.7 kΩ–10 kΩ) from the output to your logic voltage. The output pulls low when a magnetic field is detected.
• For Arduino (5 V), connect VCC to 5 V; for Raspberry Pi (3.3 V logic), power the sensor within spec and ensure the pull‑up is to 3.3 V to protect GPIO.
• Add a 0.1 µF decoupling capacitor close to the sensor’s supply pins for noise immunity.
• Pair with quality magnets and maintain consistent orientation and air gap for repeatable switching.

Why Choose This Sensor? 🌟

Engineers and hobbyists value the UGN3144 for its ease of use, broad voltage compatibility, and durable construction. Whether you’re building a tachometer, end‑stop detector, or a compact magnetic switch module, this device offers dependable performance across diverse electronics projects.