Component Identification (SOT23)

Thread Starter

doby

Joined Aug 17, 2011
49
Hi all,

I'm trying find out what this component could be, its in a SOT23 package and presumably has the marking M21 like the one beside it (you can just make out an 'M' in the bit that's still there!). I've googled it but cant find anything conclusive. It blew presumably because of water ingress, its part of a CCTV camera and this particular circuit controls the IR filter movement.

Snapshot_20170414.JPG
 

Dodgydave

Joined Jun 22, 2012
9,400
It will be a transistor possibly a fet or bipolar, you can buy a ready made cctv pcb module much easier to fix, chances are the tracks have corroded too. The IR module is just a solenoid that goes over the lens in daytime, operated by the photocell.
 
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