3SE5112-0CD02 3SE5 Series Plunger Interlock Switch, NO/NC, IP66, IP67, DPST, Metal Housing. The Siemens 3SE5 series limit switch has a plunger lever actuator and 2 contacts of a snap-action element. This switch has 1NO/1NC contact with screw connection and positive opening switching function. It has a voltage rating of 400V and a thermal current rating of 6A. Its standard design and function of the limit switch not only make it easy to select the right switch but also enable quick and easy installation, wiring and maintenance.