23mm TW Series Potentiometers. The 23mm high power wire-wound potentiometers from TE where designed to be used in a high power control environment. They are brilliant build quality with a stainless steel shaft and a rugged hard plastic casing. The potentiometers in this series are all standard with ±10% tolerance. They also have a life cycle of 10,000 operations. The 23mm series are panel mount for ease of use. The series of 23mm TW are all rotary potentiometers. This means the shaft is housed by a knob. Turning the shaft will operate the wiper and adjust the resistance. Features and Benefits –.