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12VDC Sp rocker can I use it on 24v circuit.

Discussion in 'General Electronics Discussion' started by JPU, Aug 16, 2012.

  1. JPU

    JPU

    281
    1
    May 19, 2012
    Hi All

    I have this switch

    http://www.maplin.co.uk/12v-illuminated-rocker-switch-218983

    However I have a 24V (21.5v - 29V) LIPO battery. Is there a way I can get the light to illuminate in the switch without blowing it, i.e can I use a resistor and if yes how, which one???

    Many thanks for your help.

    JPU
     
  2. duke37

    duke37

    5,254
    726
    Jan 9, 2011
    If it is a standard fitting bulb, it can be changed for a 24V one. A 28V bulb would last longer.
     
  3. JPU

    JPU

    281
    1
    May 19, 2012
    hi,,

    The switch can not be opened,,thanks anyway..

    JPU
     
  4. shrtrnd

    shrtrnd

    3,676
    454
    Jan 15, 2010
    Besides over-voltaging the switch, you have to know the amperage. If you've got a
    high amperage circuit it'll play hell with the 12V switch if it's not designed for the
    amperage you're passing through it. (It SHOULD be listed on the switch itself someplace).
     
  5. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    This appears to be a single pole switch with three pins, so I think it's wired like one of these but more likely to be the incandescent. Measure the lamp current @ 12V and we can go from there.

    Chris
     

    Attached Files:

  6. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    It's rated at 10ADC.

    EDIT: It doesn't state if it's 10ADC or AC. It should though!
     
    Last edited: Aug 17, 2012
  7. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    The datasheets are horrible, probably some mass produced Asian switch and the reseller just tossed together a cheap datasheet...

    *Edit confirmed they are just a distributor, if you download the catalog from the "Alan Butcher Components Ltd" website they state such... I'll bet if you track down the real manufacture of the switch ( Molveno OEM, out of Italy) you will garnish a lot more information about it...

    The 33FB datasheet says 12VDC 10A
     
    Last edited: Aug 17, 2012
  8. JPU

    JPU

    281
    1
    May 19, 2012
    Hi Chris

    The lamp current at 12V is .038A

    JP
     
  9. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    A 330Ω resistor in series with the lamp pin should do it.

    Chris
     
  10. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    Nice bit of sleuthing CC.

    Chris
     
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