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Power rating on resistors

Discussion in 'General Electronics Discussion' started by Ryan.Walkowski, Jan 23, 2014.

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  1. Ryan.Walkowski

    Ryan.Walkowski

    2
    0
    Jan 23, 2014
    I have a simple schematic I am following for creating LED lighting. It calls for a (1K 3W Resistor) I can only seem to source resistors that are 1K 2W, 1K 5W and 1K 7W Does that power rating matter if I go up the way too the first higher one I can find of 5W, I am assuming the 3W is maximum wattage that can pass safely through it. Am I correct in this or do I need to go and try and find a 1K 3W resistor somewhere.

    Thanks for your help

    Regards
     
  2. BobK

    BobK

    7,680
    1,685
    Jan 5, 2010
    You can always use a higher wattage resistor in place of a lower one.

    Bob
     
  3. Ryan.Walkowski

    Ryan.Walkowski

    2
    0
    Jan 23, 2014
    I did think so, But it's good to get clarification on that. Thanks
     
  4. jcurrie

    jcurrie

    128
    1
    Feb 22, 2011
    if you can use a metal film Mouser has them.
    jc
     
  5. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    wattage is what the resistor can dissipate not "pass safely through it". All wattage doesn't exist as you find out, so just use one rated above your needs with a bit of margin to be on the safe side.
     
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