PTC-15 Cermet Potentiometers Amphenol Piher PTC-15 Cermet Potentiometers feature 265° ±5° mechanical rotation angle and 240° ±20° electrical rotation angle. These potentiometers are designed with a cermet resistive element and plastic material that complies with UL 94V-0 flammability standards. Additional features include an alumina substrate and IP54 protection according to IEC 60529. Amphenol Piher PTC-15 Cermet Potentiometers come in vertical mounting with horizontal adjustment and horizontal mounting with vertical adjustment. The series operates in a -40°C to +90°C temperature range.