TR Trimmer Potentiometers CTS Electronic Components TR Trimmer Potentiometers are 6mm, 9mm, or 14mm carbon potentiometers with plastic housing. TR potentiometers feature tinned brass or tinned steel terminals and offer flexible gull-wing, through-hole, or 'J' bend terminal configurations. CTS 06TR, 09TR, and 14TR Trimmer Potentiometers are IP54-rated and ideal for dimmers, volume/lighting regulation, timers, and relays in industrial, electronics, and automotive applications.