Push switch

A push switch (button) is a momentary or non-latching switch which causes a temporary change in the state of an electrical circuit only while the switch is physically actuated.

An automatic mechanism (i.e. a spring) returns the switch to its default position immediately afterwards, restoring the initial circuit condition.

There are two types:[1] Many push switches are designed to function as both 'push to make' and 'push to break' switches.

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Push-to-break switch electronic symbol
Push-to-make switch electronic symbol
Commercially Available Push Switch – Wired up as a Push to Break Switch
Commercially Available Push Switch – Wired up as a Push to Make Switch