49E sensor S49E hall element SS49E hall switch electric bikes
 
The SS49E is a small, versatile, and cost-competitive linear Hall-effect sensor operated by a magnetic field, providing an analog output voltage proportional to the magnetic flux. It features a 3V to 6.5V operating range, low-noise output, and is ideal for motor control, position sensing, and security systems in industrial or consumer electronics.
 
Key Features & Specifications
Operating Voltage: 3V to 6.5V.
Operating Temperature: -40 °C to 100 °C (some versions rated up to 150 °C).
Output: Linear analog sourcing output ).
Sensitivity: Approximately -  2.5 mV/G
Package: Typically TO-92S (3-pin) 
Magnetic Range: Responds to both positive and negative Gauss.