Moistureproof:

A seal rating of a switch. Moistureproof seals withstand high humidity and limited exposure to water or liquid spray.

Leakage Barrier:

A ridge or web molded into a switch housing between terminals or contacts to increase the surface distance between them.

Momentary Action:

Switch that requires the operator to hold the button or lever in the operating position. The button or toggle will return to the free position (rest position) when it is let go.

Movable Contact:

The contact moved by the switch actuator into and away from contact with a fixed contact thus forming the electrical circuits possible for a given device.