Dear Forrest,

At 12.24 2011.08.09, you wrote:
>I'm assuming the t is a manufacturer logo....   search on google for=20
>'semiconductor logo' or 'diode logo' or similar and you'll find a whole=20
>bunch of pages with various logos of manufacturers.... see if you can=20
>match it.

Great!

http://www.dialelec.com/semiconductorlogos.html

Looks like the third (and last) Toshiba logo on the above page.


>My guess.. a 1S1830 from toshiba semiconductor.
>
>http://www.toshiba.com/taec/components2/Datasheet_Sync/278/1508.pdf

Looks like it really!

I will replace it with a 1N4007, which has slight worse specs, but I think
that this 1S1830 wasn't pushed to the limit.. near on fourth of them.

Thanks again for the invaluable help and for the teaching (Your other messa=
ge
was very useful too to understand how You discerned the 1S830 from the 307A
marking).

With kind regards,
Mario


>
>-forrest
>
>
>On 8/9/2011 3:22 AM, Electron wrote:
>> Hello,
>> I've to repair a board, a diode is shorted, but I cannot identify it.
>>
>> it has a symbol that resembles a lowercase t followed by 307A.
>>
>> The board is most probably made in Japan.
>>
>> The position of the diode makes me think it's a rectifier, but I'm not
>> sure it was schottky or anything else. The size and body shape looks
>> like a 1N4001.
>>
>> Could anybody help identify this t307A diode please? I can't find any
>> datasheet with this code, let away that the t is not really a t, but mor=
e
>> (non proportional font needed):
>>
>> ************
>> ************
>>      ***
>>     ***
>>    ***
>>   ***
>>
>> followed by 3 0 7 A
>>
>> Greets,
>> Mario
>>
>
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