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Jeff Liebermann Jeff Liebermann is offline
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Default On/Off Switch: Why Six Pins?

On Sat, 10 Oct 2015 11:06:13 -0400, "(PeteCresswell)"
wrote:

Before I unsolder this thing and just jump the two rightmost pins


The "on" contact traces are already jumpered on the PCB. Look at your
photo.

- and
maybe mess something up.... can anybody comment on the possible roles of
the other pins ?

https://picasaweb.google.com/1081497...33735361530914


DPDT switches are commonly used for power on/off because with 6 pins,
the switch is solidly mounted to the PCB. It will not wiggle side to
side as it would if it were a SPDT (3 pins). Also, manufactories like
to use as many of the same parts as possible. It doesn't make much
sense to inventory SPST, SPDT, DPST, and DPDT switches, when a DPDT
will do the job of all of these. Lastly, if there is any inrush
current when turning the device on, distributing the current through
two paths saves some wear and tear (or arcing) on the contacts.

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Jeff Liebermann
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