"OTTO’S sealed, double break B3S basic switch is designed for demanding applications that require a reliable seal. Sealed to IP68S, the B3S basic switch has a high cycle life - tested to 1 million cycles at logic level. The switch is also capable of handling up to an 8 amp resistive load.
Great double break circuit versatility is available with your choice of normally open, normally closed, 3 terminal SPDT, or 4 terminal SPDT.
The B3S is designed for use in places where space is limited, with or without lever actuators. In addition, they can be used as part of push button, trigger and toggle switches. Multiple terminal styles and wire lead options are available."
Otto basic switch guide