This part is a kind of semiconductor called PD202-1C-MB.

Function of this product has Singleturn Potentiometers.

Manufacturers : CONTELEC

Image and pinout :

Some of the text within the PDF file :

CONTELEC Singleturn Potentiometers PD200/210 ψ20.0mm 100,000 cycles Wirewound Features Immersion proof and washable Excellent resolution Good Linearity High life expectancy Stable long-term behavior Mechanical Data Diameter Shaft diameter Life expectancy Life expectancy Max. torque 20.0 mm 6.0 mm 100,000 cycle 10,000 cycles with higher torque 0.6 Ncm Electrical Data Nominal resistance R Resistance tolerance Linearity Maximum wiper current Power rating Maximum supply voltage Maximum contact resistance Temperature coefficient Dielectric strength Insulating resistance 100…10KΩ +/- 5% +/-0.4% 100mA 2W/40℃ Umax = (P×R)-1/2 ENR 100Ω 40 ppm/℃ 1500VAC/1min 10GΩ at 500VDC Options Shaft length up to 50 mm Flattened shaft Other shafts according to drawings (rimmed, notched, toothed, etc [ ... ]

PD202-1C-MB PDF Datasheet Download