what is dpst switch

Discussion in 'The Projects Forum' started by M@nishkewl, Dec 15, 2008.

  1. M@nishkewl

    Thread Starter New Member

    Dec 15, 2008
    1
    0
    can anyone tell me what is DPST switch.what d hell is dat.i dunno....:confused:
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Double pole, single throw.
    A crude ASCII schematic for such a switch:

    o__/ __o

    o__/ __o

    When the switch is in the "off" position, no contact is made.
    When the switch is in the "on" position, there are two separate contacts that close.
     
  3. iONic

    AAC Fanatic!

    Nov 16, 2007
    1,420
    68
    Or here.

    DPST

    The dotted line signifies the two switch points move as one part.
     
  4. RiJoRI

    Well-Known Member

    Aug 15, 2007
    536
    26
    "Pole" refers to the number of pairs of contacts there are on the switch: Single Pole is one pair, Double Pole is two pairs. Sometimes you will see Triple Pole; three pairs.
    "Throw" refers to the number of switch contacts for any given Pole pair in the switch. Single Throw is one set, Double Throw is two sets. I do not remember seeing "Triple Throw" switches, although some may use that to refer to Double Throw, Center OFF switches.

    --Rich
     
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