MICRO SWITCH WW Series Snap-in Panel Mount Switch, Single Pole Normally Closed (SPNC) Circuitry, 3 A at 125 Vac, Plunger Lever, Quick Connect Termination MICRO SWITCH͐2 WW Series' switching mechanism is a non-snap double-break shorting bar type construction. One, two, or three circuit versions are available.WWs are available with or without a plunger guard. A cheat key can be furnished for use with the plunger guard to maintain the switch plunger in the depressed condition.