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Philips Zener Diode Values and Power transistor

Hi all,

I came across a faulty zener diode and wanted to replace it. Its markings is slightly smerged thus i cant really make out the first two number/alphabet.

Marking: zyw54ph ("z" and "y" may not be wat i perceived to be) Casing: Small, white, round.

I found similar diodes from farnell (bzt03 series) but i could not make out the ratings. Any suggestion what rating this zener diode may be?

I have another power transistor but no legible markings can be read. Is there any way or tests where i can conduct to verify the trasistor values?

Any help will be greatly appreciated. Tks in advance.

ywz

Reply to
ydoubleuz
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BYW54 most likely

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ph means Philips

You could check to see if it's bipolar or mosfet and npn/pnp or n/p channel. Then substitute using common sense and a bit of nouse !.

Graham

Reply to
Eeyore

Why do you think it's a zener ?

Graham

Reply to
Eeyore

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