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Low current zener diodes?

Discussion in 'Electronic Components' started by Paul Ciszek, May 11, 2007.

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  1. Paul Ciszek

    Paul Ciszek Guest

    Does anyone sell Zener diodes that hit the constant voltage part of their
    I-V curve at currents of less than 5mA? I have a datasheet from
    Microsemi that gives the specs of 1N46xx diodes, and lists a Zener test
    current of 250uA. These would be great, except that no one seems to
    actually sell them--it's all "call for quote". Are low-current Zeners
    only manufactured by special order?
  2. Joerg

    Joerg Guest

    Pretty much. Most diodes a just "measured into" a low current by going
    into the knee. IMHO not a good thing. Central Semi is pretty good:
    Talk to Charlie Moller, very helpful.

    Long story short, most of the time when clients call in with a zener
    tolerance issue I redesign their units to accept the LMV431 and similar
    chips. Unless the few cents extra aren't in the cards, then we have to
    select a new zener.
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