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  1. #1
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    Minimum switching current for Mechanical switch

    I have a switch which specifes the minimum switching current is 10mA at 12VDC. Now my circuit switches 11mA at 5V.
    Does the power need to match ie IxV 0.01 x 12 = 120mW or would the 11mA at 5v BE SUFFICIENT???

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    Re: Minimum switching current for Mechanical switch

    Your switch rated for 12VDC at 10mA but your circuit switching at 5V it does not match

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    Re: Minimum switching current for Mechanical switch

    Hi,

    You say it is 10mA "minimum" switching current. But you treat it as "maximum".
    I doubt that 10mA is the "maximum allowed" switching current - but it may be possible.

    Best if you post a link to the datasheet.

    Klaus

    Added:
    I assume the 10mA is the minimum current you should run through the contacts.
    So 11mA is within specification.
    This "minimum current" is also known as "wetting current".
    https://en.m.wikipedia.org/wiki/Wetting_current.

    Klaus
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    Re: Minimum switching current for Mechanical switch

    Hi Klaus,
    I can get my current up to 15mA if required but It's the 12VDC that is worrying me.

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    Re: Minimum switching current for Mechanical switch

    Hi,

    Where is the datasheet?

    Klaus
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  6. #6
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    Re: Minimum switching current for Mechanical switch

    This may be about contact cleanliness / aging, and a
    non-ohmic low current I-V curve (many metal oxides
    are funky semiconductors and of low quality when
    grown in random nasty conditions).

    Doesn't mean the switch won't work, now; maybe means
    it will get noisy / crusty / resistive as it ages.

    Unless by "switch" you really meant "relay"....

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