SMD component - Can anyone identify these two smd diodes?

[Neet]

Can anyone identify these two smd diodes?

 

[d123]

Hi,

WY D5

WN EN

Another WN list.

Good luck.

 

[Neet]

I searched them with exact name but didn't find anywhere.From where I can buy them?Both r sort

 

[KlausST]

Hi,

I´ve done an internet search for: [diode smd marking code "WN"]

many thousands of results. But even on the first page there are some very good informations.
like this one: https://www.s-manuals.com/smd/wn
if you ignore all devices with unsuitable package (3-pin, 6-pin, size, picture...) then there are just 3 devices remaining.
on the most right side of the table there are links to the datasheets. Read through them about device marking.

Maybe there is no 100% exact match. Then you need to solder the device from the PCB and do some measurements.

Klaus

 

[Neet]

Both r burnt now.multimeter now show only continuity.how can I measure them now?

 

[KlausST]

Hi,

are you sure? They don´t look burnt.
And for zeners it´s quite usual that they show continuity in one direction.

How did you measure them? It can´t be done "in circuit".

If you can´t measure them:
* contact the device manufacturer
* draw a schematic from the PCB wiring?
* do trial and fail?

Klaus

 

[Neet]

They are showing continuity in both direction now.before burn they were showing value in one direction.

 

[FvM]

There's no chance to indentify a defective diode by measurements. As already shown, marking codes aren't unique. You probably need to review several manufacturer component and package datasheets to narrow down the selection. A first step would be to determine the packe length to distinguish between popular candidates like SOD-123/323/523 etc.

By the way, if the diodes are burnt, isn't it likely that other components are damaged too?

 

[KlausST]

Hi,

They are showing continuity in both direction now.before burn they were showing value in one direction.

They were good before, now they are burnt. Why? What happened?

Klaus

 

[Neet]

I replaced the other damaged components. Struggling with these two components.

--- Updated Oct 30, 2020 ---

Hi,

They were good before, now they are burnt. Why? What happened?

Klaus

These components are from primary section of a pc power supply

 

[FvM]

O.k., it's SOD-123.
"WY" looks like Diodes BZT52C2V0, exactly same marking style. WN might be BZT52C22 from Diodes or TSC, or BZT52C18 from Vishay.

 

[Neet]

O.k., it's SOD-123.
"WY" looks like Diodes BZT52C2V0, exactly same marking style. WN might be BZT52C22 from Diodes or TSC, or BZT52C18 from Vishay.

Think so but want to confirm before installing

 

[KlausST]

Hi,

The only way to be sure: contact the manufacturer.
You can't by the pictures nor by the markings.

Klaus

 

[d123]

Hi,

Shouldn't quality datasheets give the SMD code marking?

 

[FvM]

Shouldn't quality datasheets give the SMD code marking?

The linked Diodes datasheet https://www.diodes.com/assets/Datasheets/ds18004.pdf does, other manufacturers have the information in separate package or marking datasheets. But as already told, markings are not unique, they don't necessarily help to indentify arbitrary unknown components, although they sometimes do.

 

[peterkos2]

Hi. I recently repaired a laptop power supply and changed this mosfet.

 

[flcs2020]

you can try to search the smd code on this website www.marking-codes.com
good luck

 

[peterkos2]

Good day. Can you advise me what the part according to the attachment was - it was burned and I circled the empty space and the place where there are probably identical components. The designation is S1Ac and I can't find what it is and the equivalent. Maybe it's a mosfet or a double diode. There are no diagrams anywhere. well thank you
This T-CON V315B1-C05
Attached Images

IMG_20210107_115426~2.jpg (747.0 KB, 6 views)

 

[ZASto]

You should attach images directly here, not posting links to another forum. It is no-no
Many of us are not members of badcaps forum.

 

[peterkos2]

Good day. Can you advise me what the part according to the attachment was - it was burned and I circled the empty space and the place where there are probably identical components. The designation is S1Ac and I can't find what it is and the equivalent. Maybe it's a mosfet or a double diode. There are no diagrams anywhere. well thank you
This T-CON V315B1-C05
Priložené obrázky
Sorry, that was a mistake. Here's a photo