[TriEmbed] Substitute transistor

[Mike Lisanke]

I know ppl who replace their furnace controller boards with substitutes
from ebay... but reworking problems with your microwave Is gutsy! :-p

On Fri, Nov 26, 2021 at 9:11 PM The MacDougals via TriEmbed <
triembed at triembed.org> wrote:

> My microwave display suddenly went very dim.  I opened it up and found a
> discolored
>
> spot on a circuit board feeding the display (see attached image).  That
> component is
>
> marked B1238, so I assume it is a 2SB1238, which is obsolete.
>
>
>
>
> https://www.digikey.com/en/products/base-product/rohm-semiconductor/846/2SB1238/30307
>
> Medium power transistor( 80V, 0.7A) 2SB1189 / 2SB1238 Features 1) High
> breakdown voltage, BVCEO= 80V, and high current, IC= 0.7A.
>
> 2) Complements the 2SD1767 / 2SD1859. Absolute maximum ratings (Ta=25C)
> Parameter Symbol Limits Collector-base voltage VCBO −80 Collector-emitter
> voltage VCEO −80 Emitter-base voltage VEB O −5 Collector current IC −0.7 C.
>
>
>
> Anyone want to help me find a replacement?
>
> I dug through my Dad’s stash of old electronics and found a TIP30B, which
> looks like it might work.
>
>
>
>
>
> ---> Paul
>
>
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-- 
Best regards,  Mike
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