Can I use a 125v DPDT Relay in place of a 12V DPDT Relay?

Discussion in 'The Projects Forum' started by Gamedojo, Mar 18, 2015.

  1. Gamedojo

    Thread Starter New Member

    Mar 17, 2015
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    My parts came in for my Bi-Directional Motor circuit, and I somehow didn't order the relay. The only place locally that has Relay's only has a 125v version.

    Can I use the overrated Relay? or will it not trip correctly because of the battery power being too low?
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    there is too low a voltage in your circuit to pull in the relay.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Only or Maybe is if the 125v version is AC that it MAY operate on the low voltage DC, otherwise, No.
    Max.
     
  4. Gamedojo

    Thread Starter New Member

    Mar 17, 2015
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    Thanks guys... I had a feeling but wanted to check.
     
  5. MrChips

    Moderator

    Oct 2, 2009
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    There are separate specs for the relay coil and the relay contacts.
    Which one are we referring to?
     
  6. Gamedojo

    Thread Starter New Member

    Mar 17, 2015
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  7. MrChips

    Moderator

    Oct 2, 2009
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    No. Wouldn't work. That is a 110VAC coil.
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,553
    2,375
    Although like I mentioned it can be done in a pinch depending on some parameters.
    Here is a sheet from Tyco relays.
    Max.
     
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