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im new in electronic.

i don't know 2 this component:

  1. maybe this is Diode Marking ST S56 Z424

Marking ST S56 Z424

i can't found reference this part. can anyone give me a link reference or similar part?

  1. Transistor, Marking FR5505 P417D

Transistor, Marking  FR5505 P417D

i found referensi this part 55v 18A, but in my country nothing shell this item. can i replace with IRF9Z34N 55v 19A?

thank you for all the help

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2 Answers 2

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2) Yes, that is almost certainly a good substitution, the parts are nearly identical.

https://www.infineon.com/dgdl/irfr5505pbf.pdf?fileId=5546d462533600a4015356358535210f https://www.infineon.com/dgdl/irf9z34nspbf.pdf?fileId=5546d462533600a40153561228de1de0

If you suspect that the gate isn't driven hard, also look at the Vds I-V curves. The replacement is more sensitive, this is good.

enter image description here

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1) This is the power schottky rectifier STPS5L60S from ST

2) mattman944 gave an excellent comparison

With regards to repairing: Be sure you not only fix the result of the problem (replacing the broken components) but also the cause of the problem (why was the component broken in the first place? Are there more broken components that are not visually broken?).

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