Klixon Thermal Switch Wiring Diagram. Web klixon and thermik are examples of thermal switch these devices are also called pto (protection thermique à ouverture). 59 4 channel relay pin. Klixon Klixon 3BT & 4BT Precision Hermetic Thermostats from www.webmail.sensata.jobs Klixon® phenolic motor protectors are equipped with a bimetallic snap acting disc, on which the contacts […]