This is a potentiometer (pot) or variable resistor. It is very nice high quality potentiometer. The pot open up many interesting user interfaces. Turn the pot and the resistance changes. Connect VCC to an outer pin, GND to the other, and the center pin will have a voltage that varies from 0V to VCC depending on the rotation of the pot. Hook the center pin to an ADC on a microcontroller and get a variable input from the user!
This is a center-tap linear type potentiometer. The outer two pins will always show about 10K resistance, the center pin resistance to one of the outer pins will vary from 9.8K Ohm to about 4 Ohm.
This pot works great in a breadboard. However on a few breadboards, you may have to trim off the large metal anchors.
The pot is linear meaning the resistance will vary linearly with its position. This is a good choice for general user interfaces. If you need a logarithmic potentiometer see here.
• Single turn (280 degree) vertical type
• 50VAC or 20VDC maximum operating voltage
• +/- 20% resistance tolerance
• 0.3Nm stopper strength
• 50N maximum push-pull strength
• -10C to +70C operating temperature
• Great potentiometer tutorial
Below is the resistance graph. This model is "B(1B)".