Problem on circuit broad. Need info on unknow part.

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blackmagicdude

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Hey guys so I am currently working on a laser project using this **broken link removed**. However I accidentally hook it to the 12v power source and a small component instantly burned. I am not sure whether I read this correctly but that part is written "a1shb" which is in sot-23 package.

Any info on the part? Thanks
 

Hi,

Can you give any picture of the burnt part to clarify further.
 

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