Break:

An interruption in a circuit. Denotes the number of pairs of separated contacts the switch introduces into each circuit it opens.

Ambient:

Surrounding operating conditions external to the switch. This includes physical atmosphere, as well as the form and nature of applied electrical and mechanical loads.

Break Before Make:

The moving contacts of a double throw switch interrupts one circuit before completing another circuit.

Active Area (contact):

Electrical junction comprising a multitude of contact a- spots through which electrical current passes from one connector component to the other.

Actuation Force:

The force required to change a switch actuator from one position to another. Measured exactly when switch changes state. Torque for rotary products.