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SPST Momentary Push Button

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Pin Configuration

Push button can be connected in any direction. SPST Push Buttons have No polarity.



  • S.P. Push to Make (Push Button also known as Push to Make)
  • Screw Terminals
  • Square Black Nylon



  • Current Rating: 3A@ 125V AC, 1A@ 250V AC
  • Initial Contact Resistance: DC 2.5-1A, 20 Meg ohm (Max.)
  • Insulation Resistance: 500V DC 100 Meg ohm (Min.)
  • Dielectric Strength: 1500V AC for 1 Minute


Materials Used

  • Contact Material: Brass - Silver Plate
  • Terminal Material: Brass - Silver Plate
  • Terminal Type: Solder
  • Body Black Nylon


Alternate to SPST  Push Button Switches

Four terminal mini push button switches


Brief about SPST Push Button

Push button has the current rating 3A@ 125V AC and 1A@ 250V AC. The Initial Contact Resistance is 20 Meg ohm (Max.) at DC 2.5-1A. NO SPST Push button switch is a Single pole Push to Make (Push Button also known as Push to Make) and only single circuit can be controlled using it. They come in Screw Terminals.

Normally Closed configuration push buttons are also available. Also different shapes of push buttons are available as per the requirement of the circuit’s designs. There are illuminated push button are too out there.


How to Use SPST Push Button

Push buttons are used in applications which requires momentary ON or OFF switching action. Normally Open Push button switch are initially in OFF state as the contacts are not in contact with each and when pushed down the contacts gets closed and the path established between the two terminals of the push button.

Working Of SPST Push Button

The circuit diagram below has input at the one terminal and the LED connected at another terminal. The Logic indicator indicates “0” by indicating white or no colour mark when switch is not pressed. The Led remains OFF.

How To Use A Push Button

When the Push button is pushed down the input and output connected. The Logic indicator indicates “1” by indicating RED mark. Now the LED glows.



  • Momentary ON-OFF switching
  • Calculators
  • Push-button telephones
  • Kitchen appliances
  • Magnetic locks
  • Various other mechanical and electronic devices, home and commercials.

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