M8805/110-3111, P7-311121 OTTO Controls pushbutton switch. Subminiature, sealed, military grade, momentary action pushbutton switch. The P7 series incorporates OTTO’s patented double break design in a significantly smaller package than the P1 series. These subminiature switches embrace today’s technology requirements by allowing for a large number of switches to fit within a faceplate. The long life snap-action design is protected from the environment by a silicone rubber boot, operating on a patented “rolling sleeve” principle that gives long sealed life and smooth operation. The P7-311121 from OTTO Controls is designed to meet the requirements of MILPRF-8805 including low level switching (10mA @ 30mV) with power switching up to 5 amps at 28VDC as well. This version has solder terminals, is normally open, a black bezel and red button.