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From: andykiroki on 8 Jan 2007 21:08
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

From: Eeyore on 8 Jan 2007 22:04


andykiroki(a)volcanomail.com wrote:

> 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.

It's a common enough type with suitable substitutes also made by most major
power semi vendors.

Maybe if you said which country you live in I could help advise a source.

Graham



From: Jim Land on 8 Jan 2007 22:05
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?
From: James Sweet on 8 Jan 2007 22:30
andykiroki(a)volcanomail.com wrote:
> 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
>


Make sure you check the rest of them as well, if one is blown, chances
are more are bad.
From: Eeyore on 8 Jan 2007 23:29


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.

These are pretty much generic parts. Not sure what the B means but most 20N50s
should do the job I'd reckon.

Graham

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