How we calculate the Amp. rating of On/off switch if our final load is 20A DC

Discussion in 'General Electronics Chat' started by sumit123, Feb 23, 2016.

  1. sumit123

    Thread Starter New Member

    Oct 28, 2013
    11
    0
    Request to confirm how we calculate the minimum amp. rating of on/off switch is required if our final load is as follow:
    Voltage 3.6V & Amp.18A.
     
  2. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,546
    1,252
    To switch 18 A DC requires a switch rated for at least 18 A DC. For good long-term reliability it should be rated for at least 30 A. 40 A is preferable.

    I realize that this is not the answer you want, but it is the answer to the question you asked.

    ak
     
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