Siemens Actuator head, spring rod for position switches 3SE51/52Actuator head: spring rod for position switches 3SE51 52 only with snap action contacts, total length 142. 5 mm, Plunger = 50 mm, Plunger = 50 mm, made of plastic actuator head for position switch SIRIUS 3SE5 for position sensing of machine parts and position monitoring of protection equipment. The modular design of the 3SE5 position switches permits a host of variants with a small number of bearing types. The wide variety of plug in connectors and