EEVblog Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: vladimirmalic on June 08, 2017, 07:47:47 pm

Title: Unknown component
Post by: vladimirmalic on June 08, 2017, 07:47:47 pm

Hi all,

Can you please help me to identify this component:
(https://www.eevblog.com/forum/projects/unknown-component-89764/?action=dlattach;attach=322313;image)

Thanks in advance.

Title: Re: Unknown component
Post by: tatus1969 on June 08, 2017, 08:24:05 pm

could be that this is an exotic package for a LM313 reference diode. Do you have a diode tester, what does it say?

Title: Re: Unknown component
Post by: Zero999 on June 08, 2017, 09:37:32 pm

Is it flat or rounded on the other side? The picture isn't clear.

How big it it? Perhaps show a rule next to it?

Title: Re: Unknown component
Post by: calexanian on June 08, 2017, 09:40:03 pm

Well its got the big M on it so its Matsushitsa Panasonic.

Title: Re: Unknown component
Post by: wraper on June 08, 2017, 09:41:52 pm

You should show where on the PCB you desoldered it from. In the wast majority of cases, just showing an obscure component without showing where it originated from, is useless.

Title: Re: Unknown component
Post by: CJay on June 08, 2017, 10:33:46 pm

Matsushita PN313 photodiode.

http://www.datasheetarchive.com.cn/pdf/download.php?id=5c5a7d6dc5e787e406112a6df2ba7673a499e1&type=P&query=WE%2B77%2FPN313 (http://www.datasheetarchive.com.cn/pdf/download.php?id=5c5a7d6dc5e787e406112a6df2ba7673a499e1&type=P&query=WE%2B77%2FPN313)

Title: Re: Unknown component
Post by: vladimirmalic on June 09, 2017, 08:48:10 pm

Thanks to everyone, especially to CJay.

Now it's redundant, but here you can find some better pictures, from both sides, near ruler. Diode test showing 0,573V.

(https://www.eevblog.com/forum/projects/unknown-component-89764/?action=dlattach;attach=322620)(https://www.eevblog.com/forum/projects/unknown-component-89764/?action=dlattach;attach=322622)