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Power Transistor Data sought
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Topic: Power Transistor Data sought (Read 566 times)
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Neomys Sapiens
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Posts: 3268
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Power Transistor Data sought
«
on:
July 19, 2020, 10:58:01 pm »
Does anyone have access to a datasheet of a very large Siemens power transistor labeled BTr F 0111 ?
(It is stud mounted with M12 thread and 27mm across flats)
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Chris_Walch
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Re: Power Transistor Data sought
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Reply #1 on:
July 20, 2020, 04:27:25 pm »
The prefix BT is commonly used for thyristors, but I didn't find any with your markings.
Please post a picture of the component.
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Neomys Sapiens
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Re: Power Transistor Data sought
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Reply #2 on:
July 20, 2020, 07:41:30 pm »
Marking details:
BTr over F0111, around 90° to the right: 5A, around 45° left: symbol of NPN transistor, around 90° left: SH logo over SIEMENS
Stamped on one flat of hex nut: A2550
And here it is:
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Benta
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Re: Power Transistor Data sought
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Reply #3 on:
July 20, 2020, 08:13:13 pm »
Wow, that looks really 60s, perhaps early 70s.
A wild guess would be an automotive part for ignition coil drive.
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Neomys Sapiens
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Re: Power Transistor Data sought
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Reply #4 on:
July 20, 2020, 08:51:52 pm »
@Benta: Although the fusion of the various parts into the Siemens AG was effected in 1966, the Logo with the S and the H was purpotedly in use until 1973, when a unified Logo was in use. This would support your assessment.
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