Latching switch

A latching switch is a switch that maintains its state after being activated. A push-to-make, push-to-break switch would therefore be a latching switch - each time you actuate it, whichever state the switch is left in will persist until the switch is actuated again.

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  ABB E256 latching relay

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  Moeller Z-S230 latching relay

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  wiring diagram of latching switch

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  example of latching switch using GE PLS+ relay