Author Topic: Slide Switch Terminology  (Read 5116 times)

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Offline ElectronicTonicTopic starter

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Slide Switch Terminology
« on: December 04, 2013, 04:58:26 pm »
In the schematic in Dave's recent uCurrent video (#552), I saw the switches labeled as "SW-DT3T-NOCOMMON".
What does the "DT3T" stand for?

I am certainly familiar with "Pole" and "Throw" terms, like "DP3T" for switches that have a common terminal, but what is the proper way to describe a slide switch with a contact moving from one pair of terminals to a second pair and to a third pair with no common terminal?

Another example is this switch specified as "Double Pole, Three Position"
http://switches-connectors-custom.cwind.com/item/standard-slide-switches-2/top-actuated-maintained-slide-switches-2/g-328s-0000
Just as in Dave's schematic, it has 4 evenly spaced terminals on each side with a sliding contact that connects two at a time, like this old-school html-ish diagram:

        |        |        |        |
        O        O        O        O

                 #        #
         . . .   #        #   . . .
                 #========#

                 #========#
         . . .   #        #   . . .
                 #        #

        O        O        O        O
        |        |        |        |


I am also familiar with other slide switches with 3 positions in which the terminals are not evenly spaced and are arranged in such a way that they do indeed have a common terminal. My question is, what is the best way to describe a slide switch that has 4 or 5 evenly spaced terminals per side (3 position or 4 position, respectively) with no common terminal?
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Offline AndersAnd

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Re: Slide Switch Terminology
« Reply #1 on: December 04, 2013, 06:45:07 pm »
I am certainly familiar with "Pole" and "Throw" terms, like "DP3T" for switches that have a common terminal, but what is the proper way to describe a slide switch with a contact moving from one pair of terminals to a second pair and to a third pair with no common terminal?
Not sure what the proper term to describe these are (if there is any term), but C&K still calls it DP3T even though there's no common terminal for all 3 throws.
Some examples are C&K OS203013MT6QN1 and OS203013MT8QN1.
C&K OS series datasheet: http://www.ck-components.com/14388/os_11mar13.pdf/
 


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