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  • BZX79 vs. BZX55

    From Jon Schneider@21:1/5 to All on Sun May 15 10:21:47 2022
    What is the difference between BZX79 and BZX55 (and other) series Zener
    diodes ?

    I've tried comparing datasheets but cannot find both series from the
    same manufacturer.

    Thanks,

    Jon

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  • From Reinhard Zwirner@21:1/5 to Jon Schneider on Sun May 15 18:42:24 2022
    Jon Schneider schrieb:
    What is the difference between BZX79 and BZX55 (and other) series Zener diodes ?

    Wild guess: Just the manufacturer who wants to avoid that customers
    having tested and thereafter implemented diodes out of his series
    could switch without problems to same named types fom manufacturer B?

    Bye

    Reinhard

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  • From John Robertson@21:1/5 to Jon Schneider on Sun May 15 13:07:15 2022
    On 2022/05/15 2:21 a.m., Jon Schneider wrote:
    What is the difference between BZX79 and BZX55 (and other) series Zener diodes ?

    I've tried comparing datasheets but cannot find both series from the
    same manufacturer.

    Thanks,

    Jon

    Possibly the case material? Some are glass, others are plastic...

    My 1975 Motorola book says the BZX79 series are glass. I don't have a
    reference book that covers the BZX55 series though.

    John :-#)#

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  • From Reinhard Zwirner@21:1/5 to John Robertson on Mon May 16 00:08:30 2022
    John Robertson schrieb:
    On 2022/05/15 2:21 a.m., Jon Schneider wrote:
    What is the difference between BZX79 and BZX55 (and other) series
    Zener
    diodes ?

    I've tried comparing datasheets but cannot find both series from the
    same manufacturer.

    Thanks,

    Jon

    Possibly the case material? Some are glass, others are plastic...

    My 1975 Motorola book says the BZX79 series are glass. I don't have a reference book that covers the BZX55 series though.

    TELEFUNKEN electronic
    1985 Data Book

    BZX55

    CASE: JEDEC DO35

    HTH

    Reinhard

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  • From legg@21:1/5 to jon@jschneider.tenreversed on Mon May 16 09:36:57 2022
    On Sun, 15 May 2022 10:21:47 +0100, Jon Schneider
    <jon@jschneider.tenreversed> wrote:

    What is the difference between BZX79 and BZX55 (and other) series Zener >diodes ?

    I've tried comparing datasheets but cannot find both series from the
    same manufacturer.

    Thanks,

    Jon

    From (1989) Philips:

    BZX79 are available in tolerances of 5, 3, 2 and 1%.
    They also have a lower specified leakage current, at low voltage.
    ( 1/2 to 1/4 of BZX55 ).

    No practical difference - suspect mfr locations differed.

    RL

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  • From Reinhard Zwirner@21:1/5 to legg on Mon May 16 22:36:58 2022
    legg schrieb:
    On Sun, 15 May 2022 10:21:47 +0100, Jon Schneider <jon@jschneider.tenreversed> wrote:

    What is the difference between BZX79 and BZX55 (and other) series Zener
    diodes ?

    I've tried comparing datasheets but cannot find both series from the
    same manufacturer.

    Thanks,

    Jon

    From (1989) Philips:

    BZX79 are available in tolerances of 5, 3, 2 and 1%.

    As are BZX55: - Mit engeren Toleranzen lieferbar (Available with
    tighter tolerances).

    They also have a lower specified leakage current, at low voltage.
    ( 1/2 to 1/4 of BZX55 ).

    I would say it is the other way round - see

    <https://www.bilder-hochladen.net/files/big/12b4-144-1a15.jpg>

    No practical difference - suspect mfr locations differed.

    Agreed - probably.

    Bye,

    Reinhard
    [not in any way affiliated with one of the manufacturers ;-)]

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