AH175 Hall Effect Sensor

The AH175 is a digital Hall-effect switch. It detects magnetic fields and changes its output state based on the presence of a south magnetic pole.

Features

• Operating Voltage: 3.8V to 24V
• Output Type: Open Collector (NPN)
• Magnetic Polarity: South Pole Activation
• Package: TO-92 or SOT-23
• Fast Response Time

Pin Configuration (TO-92)
 

1. Vcc (Power Supply)
2. GND (Ground)
3. OUT (Digital Output)

Applications

• Magnetic door switch
• Speed detection (RPM)
• Magnetic position sensing
• Embedded systems

Working Principle

When a south magnetic pole is close to the sensor, the output goes LOW. When the magnetic field is removed, the output returns to HIGH (with a pull-up resistor connected).