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From: Eeyore on 8 Jan 2007 23:33


Jim Land wrote:

> andykiroki(a)volcanomail.com wrote in news:1168308527.848268.122730
> @s34g2000cwa.googlegroups.com:
>
> > Where could
> > I start looking for a supplier of this device. I only
> > want a one off.
> >
> > Type W20NB50 made by ST.
> >
>
> Digi-Key says:
> MOSFET N-CH 500V 20A TO-247 made by STMicroelectronics
>
> but they don't stock it.
>
> The NTE cross-reference at
> http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
>
> says you can replace it with an NTE2970, but that doesn't seem to be
> stocked either.
>
> Anyone?

Farnell don't have 20n50s but do have 20n60s.

http://uk.farnell.com/jsp/search2/browse.jsp?N=500015&Ntk=gensearch_001&Ntt=20n60&Ntx=&_requestid=739140

Don't mix up the IGBTs and mosfets. Also check what IR and STM have.

Graham


From: Franc Zabkar on 11 Jan 2007 00:55
On 8 Jan 2007 18:08:47 -0800, andykiroki(a)volcanomail.com put finger to
keyboard and composed:

>Hello,
>
> I am attempting to repair a Cebora Power Rod 1565 welder. This is a
>switched mode type device.
>
> One of the power MOSFETS is visabely blown. Where could
> I start looking for a supplier of this device. I only
> want a one off.
>
> Type W20NB50 made by ST.
>
>Thanks for any help.
>
>The company Cebors has a site at WWW.CEBORA.IT
>
>They supply a service manual to Authorized dealers only :-(
>
>
>Andy

Try RS Components, part number 248-4242, ST part number STW20NB50.
http://www.rs-export.com

Datasheet:
http://docs-europe.electrocomponents.com/webdocs/002f/0900766b8002f66d.pdf

Otherwise Farnell appear to have the STW20NK50Z.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
From: andykiroki on 20 Jan 2007 20:13

Hello,

Thanks very much for all the replys. I will order some FETS and see
how I get on.

There is a service manual for the welder available at WWW.CEBORA.IT
but you need a password to access it.
Have tried asking for a password to no avail:-(.

Cheers,
Andy

From: Homer J Simpson on 20 Jan 2007 22:03

<andykiroki(a)volcanomail.com> wrote in message
news:1169342033.179493.226090(a)l53g2000cwa.googlegroups.com...
>
> Hello,
>
> Thanks very much for all the replys. I will order some FETS and see
> how I get on.
>
> There is a service manual for the welder available at WWW.CEBORA.IT
> but you need a password to access it.
> Have tried asking for a password to no avail:-(.

Try www.cebora.it or variations like cebora.it




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