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Old 1st December 2010, 04:02 PM   #1
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Default Transistor Code Marking/Logo S Over H, What Brand?

I need to find out the manufacturer of a transistor that has a marking/logo which looks like an S over H. Any ideas? Thanks for the help!
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Old 1st December 2010, 04:09 PM   #2
Mooly is offline Mooly  United Kingdom
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Fujitsu maybe, post a picture or draw it

Semiconductor Identification Logos Page 1
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Old 1st December 2010, 04:42 PM   #3
infinia is offline infinia  United States
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Siemens.
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Old 1st December 2010, 07:09 PM   #4
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Quote:
Originally Posted by infinia View Post
Siemens.
Yes, probably. Siemens came from a company called Siemens & Halske.
They used to have the intertwined S and H logo.

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Old 1st December 2010, 11:33 PM   #5
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This is for a dual jfet 2N5566. Did Siemens ever make such a transistor?
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Old 1st December 2010, 11:46 PM   #6
jaycee is offline jaycee  United Kingdom
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http://www.siemens.cz/siemjetstorage...36332_logo.gif
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Old 2nd December 2010, 12:37 PM   #7
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Default JFET

Quote:
Originally Posted by NagysAudio View Post
This is for a dual jfet 2N5566. Did Siemens ever make such a transistor?
Hi Norbert,

I have a list of manufacturers of the 2N5566 JFET dated back to 1988.
I don't want to put it out on display in the forum.
Siemens and Motorola is not listed as manufacturers of this JFET.
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Old 2nd December 2010, 03:19 PM   #8
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Jaycee - That is exactly the marking on this 2N5566 jfet!

Tommy1000 - Thanks! The jfets in question are dated from 1988 and they have the Siemens' symbol as in Jaycees post...
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Old 2nd December 2010, 04:34 PM   #9
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Quote:
Originally Posted by NagysAudio View Post
Jaycee - That is exactly the marking on this 2N5566 jfet!

Tommy1000 - Thanks! The jfets in question are dated from 1988 and they have the Siemens' symbol as in Jaycees post...
Which one - Jaycee's post has 6 markings...
Is it a Siemens/Halske one?

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Old 2nd December 2010, 04:44 PM   #10
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Quote:
Originally Posted by janneman View Post
Which one - Jaycee's post has 6 markings...
Is it a Siemens/Halske one?

jan didden
I see only one type of H-S symbol!
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