Switches

Switches

Industry: Electronic components

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Switches

National Electrical Manufacturers Association (NEMA)

Electronic components; Switches

A US Standards setting group. It sets standards for switch products, especially switches mounted in various enclosures offering specified degrees of protection against intrusion of liquids, dust, ...

normally closed (NC)

Electronic components; Switches

Normally closed contacts are closed when the switch actuator is in its unactuated position (e.g., the plunger is in the resting position in the case of a pushbutton switch).

normally open (NO)

Electronic components; Switches

Normally open contacts are open when the switch actuator is in its unactuated or resting position.

oil-tight

Electronic components; Switches

A generic term for a panel seal commonly used in industrial settings. Defined by NEMA standard.

open frame

Electronic components; Switches

Typical to slide switches ; open frame construction allows for automatic solder process and post solder cleaning. Contrast with "washable".

operating temperature

Electronic components; Switches

The range of temperature within which the device may be used.

operator

Electronic components; Switches

A panel-mounted mechanical device (pushbutton, selector, keylock, etc.) without contacts to which one or more contact blocks may be added to make a complete switch.