Push Button Switches

A push button switch is a mechanical switch having an activation method in the form of a plunger that is pushed down for opening or closing the switch.


Push Button Switches Features
There are certain common features that these switches have. They are:

• Dust proof
• High inrush current compatible
• Illuminated switch
• Imprinted markings
• Locking switch
• Pilot light
• Tape and reel packaging
• Time delay
• Vandal proof
• Wiping contacts
• Weather resistant

Pole and Throw Configurations
These can be:

• Single pole single throw (SPST) : This switch has two terminals and makes or breaks the connection of a single conductor in a single branch circuit.
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• Single pole double throw (SPDT): This switch has three terminals and makes or breaks the connection of a single conductor with either of two other single conductors.
  
  
• Double pole single throw (DPST): This switch has four terminals and makes or breaks the connection of two circuit conductors in a single branch circuit.
  
  
• Double pole double throw (DPDT): This switch has six terminals and is available in both momentary and maintained contact versions. The switch makes or breaks the connection of two conductors to two separate circuits.

These switches can have recessed, flush, or raised actuator. The function can be either maintained contact, alternating contact, or momentary contact.

Push Button Specifications
There are certain important specifications that must be considered, when selecting push button switches. These are:

• Maximum current
• Maximum AC voltage
• Maximum DC voltage
• Maximum power
• Terminal types
• Material of construction

Approvals and Certifications
There are certain organization that provide certifications and approvals to push button switches, ensuring high quality and performance to customers. Some of these certifications are:

• CE certification
• CSA certification
• UL listing