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I love the precision of the MTBF...

Discussion in 'Electronic Components' started by Joel Koltner, Feb 12, 2008.

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  1. Joel Koltner

    Joel Koltner Guest

  2. Ryan Weihl

    Ryan Weihl Guest

    ha, they could have used "days" too and it would not make any
    difference


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  3. Tim Shoppa

    Tim Shoppa Guest

    There's 8 digits on a calculator, and you have to WRITE THEM ALL DOWN
    or else the answer is WRONG!!!

    I ought to write Zippy the Pinhead, except that I cannot capitalize
    randomly enough!

    Tim.
     
  4. Fred Bartoli

    Fred Bartoli Guest

    Tim Shoppa a écrit :

    MTBF is a *mean* time. That's why they've dropped minutes and seconds
    which would have been of no significance.
     
  5. legg

    legg Guest


    MTBF of fixed magnetic components has never been a significant factor
    in the typical electronic system.

    Seems rather pointless to have an Irms rating that exceeds Isat in a
    power filter choke, though. In effect, the component is designed to
    fail.

    RL
     
  6. legg

    legg Guest

    Changed my mind about this - it could be a tip of the hat at the
    possibility of core loss, which is seldom anticipated by smd part data
    sheets. Pity they're not documented in this sheet either, though.

    RL
     
  7. Comme ti es drôle, mon Fredo....incorrigible farceur !!!
    Preggo

    Vincent
     
  8. Joel Koltner

    Joel Koltner Guest

    It is a little weird, the Irms vs. Isat ratings.

    As far as I can tell Coilcraft has decided they'd like some of Pulse's market
    share. Too bad their inductors aren't quite as good... although they're close
    enough I suppose they figure they'll compete on price.
     
  9. legg

    legg Guest

    Everyone and their cousin is manufacturing these things without
    reference to AC or pulsed DC circuit operation. With some of the
    moulded part core materials, core loss has a considerable contribution
    to temperature rise.

    RL
     
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