SS443A
Overview
The SS443A is a high-performance unipolar Hall-effect digital switch from Honeywell designed for reliable position sensing and speed detection. It operates on a wide supply voltage range from 3.8V to 30V and features a temperature-compensated open-collector output capable of sinking 20mA. The device utilizes a quad-Hall IC design to minimize the effects of mechanical stress on the sensor's sensitivity.
Why Choose This Part
The SS443A offers excellent thermal stability through temperature-compensated magnetics, ensuring consistent trip and release points from 7.5mT to 18mT across its operating range. Its wide 30V input capability allows it to interface directly with industrial 24V logic systems, while the open-collector output simplifies interfacing with different logic voltage levels via a pull-up resistor.
Applications
Key Specifications
Getting Started
To integrate the SS443A, connect the supply voltage (Pin 1) and ground (Pin 2), then place a 10k ohm pull-up resistor between the output (Pin 3) and your microcontroller's VCC. Ensure the magnet's south pole faces the branded front of the TO-92 package to trigger the sensor. Use an oscilloscope to verify the switching threshold and ensure the magnet is within the 18mT trip distance.
