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Snap Action Switches

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About Snap Action Switches

Snap action switches are mechanical switches that produce a very rapid transfer of contacts from one position to another. They are useful in situations that require a fast opening or closing of a circuit, such as a mouse button or appliance setting.  Actuator styles available for snap action switches include lever, pushbutton, and roller.  Lever actuators can be straight or formed levers.  A pushbutton actuator is sometimes called plunger style.  A roller style actuator can be actual roller or simulated roller.

Pole and throw configurations for snap action switches can be single pole single throw (SPST), single pole double throw (SPDT), double pole single throw (DPST), or double pole double throw (DPDT).  SPST is a switch that makes or breaks the connection of a single conductor in a single branch circuit. This switch typically has two terminals. It is commonly referred to as a "Single-Pole" Switch.  SPDT is a switch that makes or breaks the connection of a single conductor with either of two other single conductors. This switch typically has 3 terminals, and is commonly used in pairs and called a "Three-Way" switch.  DPST is a switch that makes or breaks the connection of two circuit conductors in a single branch circuit. This switch typically has four terminals.  DPDT is a switch that makes or breaks the connection of two conductors to two separate circuits. This switch typically has six terminals and is available in both momentary and maintained contact versions.  A normally open (NO) switch has contacts that are open or disconnected in their unactuated (normal) position.  A normally closed (NC) switch has contacts that are closed or connected in their unactuated (normal) position.

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Products & Services Related to Snap Action Switches

DIP Switches
Dual in-line package (DIP) switches are electronic packages that consist of a series of tiny switches. DIP switches are used to configure computers and peripherals such as circuit boards and modems.
Pushbutton Switches
Pushbutton switches are mechanical switches defined by the method used to activate the switch. The activation method is typically in the form of a plunger that is pushed down to open or close the switch.
Reed Switches
Reed switches are magnetically actuated switches. They are typically manufactured with two ferromagnetic reeds (contact blades), which are sealed in a glass capsule. In the presence of a magnet, the blades (contacts) close. 
Rotary Coded DIP Switches
Rotary coded dual in-line package (DIP) switches are activated by a rotating shaft and have several stop positions. They use the DIP form factor so that arrays of multiple switches can be incorporated into a single package.

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Engineering Web: Snap Action Switches

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Snap Switches
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See Grainger Industrial Supply Profile & Catalog
APEM: Professional switches manufacturer, joysticks, LED...
- Pushwheel Switches - Knobs - Snap-action Switches - Rocker Switches - MEC Switches - Emergency Stop Switches
See APEM Components, Inc. Profile & Catalog
Switches - Tyco Electronics
Snap Action Switches 3 industry standard sizes Momentary or maintained action Pushwheel Switches
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Part Numbers for Snap Action Switches

Part # Distributor Manufacturer Product Category Description
3XG56 Grainger Industrial Supply OMRON Limit/Interlock Switches Switch,Snap Action
3XG58 Grainger Industrial Supply OMRON Limit/Interlock Switches Switch,Snap Action
3XG60 Grainger Industrial Supply OMRON Limit/Interlock Switches Switch,Snap Action
3XG55 Grainger Industrial Supply OMRON Limit/Interlock Switches Switch,Snap Action
3XG57 Grainger Industrial Supply OMRON Limit/Interlock Switches Switch,Snap Action

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