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Identification of electronic components

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enea

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identification of electronic components

Hi,
I'm analyzing the circuit shown in the image and I need to recognize the 3 marked elements. The T27I is a diode but I have no idea of the manufacturer. The other two components have a SOT23 package and are marked with A7 9(rotated of 90°) and W9C 70(rotated of 90°) respectively.
Can someone help me identify this components?

Thank you
Enea
 

kender

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identification of electronics components

Enea,

I don't know how to help you with identification.

I'm curious - what's the purpose of your board? Is the the diode-capacitor "ladder" on the lower right a high-voltage supply?

Cheers,
- Nick
 

enea

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w9c cpacitor

It is a gate driver unit for 6.5kV IGBTs. On the lower left there is a "big" voltage divider needed to measure the voltage between collector and emitter.
I found some of the components looking at SMD marking code databases, but I couldn't find everything.
 

wayudz

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Hi,
Check markingcodes' original type no is our major job.Welcome to join our gold member.
The markingcode promblem you post, i checked them for you.see below:
-----------------------------------------------------------------------------------------
A7 BAV99LT1 SOT23 Diode-Switching Diode,(dual,se ... ON/
-----------------------------------------------------------------------------------------
W9C PLVA656A SOT23 Low-voltage avalanche regulato ... PHI -----------------------------------------------------------------------------------------


David
I'm one of EDAboard!
david@smdok.com
https://www.smdok.com
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We providing searching service of smdcodes(also known as markingcode,top mark,marking and package marking). Our database incluses the codes of transistors, diodes, tvs, thyristors, ics, etc. You will be suprised to find many dip components' code and many smd codes those hard to find in the internet or anywhere else. The news is that the database quantity is grouping up day by day. Nomatter easy code or difficulty code, all you need to do is to input codes and search, instead of collecting everyday. Why? Because we, your support team is doing that for you.
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