SMD switch test mod

Discussion in 'The Projects Forum' started by xMackx, Mar 9, 2013.

  1. xMackx

    Thread Starter New Member

    Feb 18, 2013
    3
    0
    I recently found a great deal on some SMD push button switches, 400 for 5 bucks so I grabbed them. Now they are supposed to be rated 12VDC 50mA. Since they only cost a penny a piece I figured I could experiment and see what they can handle. So I hooked one up to an ugly ecig test mod, 3.7VDC 2Amp. I have been using it all week and it's still working great. Can someone tell me why it hasn't given out yet?
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  2. antonv

    Member

    Nov 27, 2012
    149
    27
    A switch is often rated to do a 1,000,000 cycles at its rated voltage/current.

    In your application it may live through a 1,000 cycles (just a guess). How many have you done?
     
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  3. xMackx

    Thread Starter New Member

    Feb 18, 2013
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    How is a cycle rated? Still learning, just started learning basic circuitry. Is a cycle when the switch is momentarily pushed?
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    yes
    A cycle is a complete push/release actuation of the device.
    And a switches voltage/current rating is based on a multitude of factors/tests.

    Rule of thumb... Trust and do not exceed a devices ratings.


    But for destructive fun..sure..beat the crap out of it just be aware of what could happen in a failure. melting/shorting/fires,etc..
     
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  5. xMackx

    Thread Starter New Member

    Feb 18, 2013
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    What else could I use with these switches to keep the rating safe? Someone mentioned I could use a mosfet.
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    Any one of a million circuits that you need a switch with 12V and under 50ma :p

    But yes you can also use the switch to turn on a relay or transistors/mosfets,etc.. or any device where it just takes a small "control" voltage to switch a larger load.
     
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