P16 Series Knob Potentiometers The Vishay / Sfernice P16 Series Knob Potentiometers are a revolutionary concept in panel mounted potentiometers. This unique design consists of a knob driving and incorporating a cermet potentiometer. The mounting hardware and terminals are situated on the back side of the panel reducing to a minimum the required clearance. The Vishay / Sfernice P16 Knob Potentiometers feature 1W at 40ºC and test according to CECC 41300. Fully sealed and panel sealed, the P16 and PA16 are safe to use due to good insulation: >,104MΩ VDC.