BZX79 vs. BZX55...

[Jon Schneider]

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

 

[Reinhard Zwirner]

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

 

[John Robertson]

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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[Reinhard Zwirner]

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

 

[legg]

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

 

[Reinhard Zwirner]

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 ;-)]