I ordered a SPST switch (Through hole type) from distributors and also download the cad file for PCB layout from the same website. I am now confused with the pin configuration, in the footprints it has 3 holes. Usually the SPST switch has only 2 pins right?. I have gone through the datasheet but I did not understand it completely about the pins because they have the same diagram for SPST and SPDT I suppose. My question is, if it has 3 pins then what will be the pin connection if I want to just turn ON and OFF the circuit and If it has only 2 pins then which pin should I ignore(delete) in the footprints. I attach the footprints picture and datasheet link with this. Footprints which I downloaded are perfect with the measurements (for 3 Pins). Please let me know if u have any leads on this. Thank you


enter image description here

  • \$\begingroup\$ That datasheet is for a family of switches. Which SPECIFIC one did you order? Some have two pins and others have 3. \$\endgroup\$
    – jwh20
    Jan 11, 2021 at 14:03
  • \$\begingroup\$ I have ordered 10TC605 which is SPST. \$\endgroup\$ Jan 11, 2021 at 14:24

1 Answer 1


The SPST model should only have two pins as can also be seen in the datasheet, although it is not clearly labeled. Removing either pin 1 or 3 should work, since the pin spacing is equal. enter image description here

  • \$\begingroup\$ Lets say I consider pin 1 and 2, In this case do i need to worry about the configuration? for example pin 1 should be connected to supply and pin 2 should be connected to any device (relay or bulb). Or does it work either way. Please let me know \$\endgroup\$ Jan 12, 2021 at 12:14
  • \$\begingroup\$ It'll work either way. \$\endgroup\$
    – vu2nan
    Jan 15, 2021 at 13:10

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