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 How snap action works



When pushbutton 3 is actuated and depressed beyond the snap-over point of the snap springs 5 , plunger 9 with contact bridge 8 as integral part moves upwards to the effect that the NC contacts 7 break and the NO contacts 6 make contact. Positive opening operation in action With welded NC contacts 7 or a broken spring 5 , the failsafe action comes into play forcing the contacts open by providing a positive mechanical link between  actuator 3 and contact bridge 8 .
The actuating force is, thereby, handed down by the following parts of the switch which are not springy:
tips 10 of actuator (pushbutton) 3
either of the two positive opening levers 1
pivot point 2 , where the actuating force is being transferred to the plunger
plunger 9 by which contact bridge 8 is supported
The folding down of the positive opening levers 1 at pivot point 2 causes plunger 9 to move upwards, resulting in the forced disconnection of contact bridge 8 from the NC contacts 7 . This positive transmission of the actuating force onto the NC contacts in case the snap-action mechanism fails is what positive opening operation is all about.


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Name Code Image Description Data
Series S800,S804,S814 A S800,S804,S814 Series S800,S804,S814
Snap-action switches with positive opening operation download
Series S820 A S820 Series S820
Snap-action switches with enhanced current-carrying capacity download
Series S826 A S826 Series S826
Snap-action switches with positive opening operation and self-cleaning double-break contacts download
Series S834 A S834 Series S834
Enabling switches for manual control units of industrial robots download
Series S840 A S840 Series S840
Snap-action switches with positive opening operation- and self-cleaning contacts. download
Series S847 A S847 Series S847
Snap-action switches with positive opening operation and self-cleaning double-break contacts download
Series S850 A S850 Series S850
Snap-Action switches with double NC contacts, positive opening operation and wiping action. download
Series S870 A S870 Series S870
Snap-action switches with positive opening operation- and self-cleaning contacts download
Series S880 A S880 Series S880
The world's smallest snap switch with positive opening operation download


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