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Old 20th December 2012, 07:53 PM   #1
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Default Transistor R4389 and R4363

anyone knows these transistors ?
printed code is R4389 (H844) and R4363 (H905)
one vague source in the net says 100V 56A, likely MOSFET
the company logo (capital bold letter H) is this Harris ?
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Old 21st December 2012, 07:40 AM   #2
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Location: Fosser, Aurskog-Holand, Akershus, Norway.
BUK9620 replaces R4363.

It is a small Mosfet switching transistor.
You will find a datasheet here: BUK9620-55 pdf, BUK9620-55 description, BUK9620-55 datasheets, BUK9620-55 view ::: ALLDATASHEET :::

R4389 is also a Mosfet switching transistor.


Is this a picture of some Car-equipment of any sort?
Have a feeling I have seen those in ignition systems for cars in the nineties.
It is a 60V 50A N-channel switchMosfet.I am not sure what replaces it.
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Old 22nd December 2012, 09:38 PM   #3
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Thanks, Tandberg ...
1995 vintage fuel injection maybe
where did you get the equivalence info from ?
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