Hi, I've exhausted my ability, patience and time trying to identify a SOT-23 transistor/mosfet/??? with the marking B6CC3. Can anyone offer any help please.
A pair of them are used to drive a small transformer, to provide 5 volts to feed a a 3.3 volt regulator.
Wild guess, but B6 may be a vendor designation. Seems similar to a BAT54C common Cathode Schottky Barrier diode. The CC3 may be a date code, but the "C" may imply the common cathode. Again, just guessing....
If you have a device on the same board that is the same, and not damaged, see if you can check the diode function(s) of a good chip
Thanks sagor1. It is an active device, not just a diode.
Checking on other boards, the device doesn't measure as a normal transistor ... I'll have to remove one to get a better idea.
As mentioned above, a pair of them are used to drive a small transformer, to provide 5 volts to feed a a 3.3 volt regulator. Just a small section of circuit to provide an isolated supply for the comms section.
There are bars above those C's I wonder whats the significance ? Any idea what country/ies these boards were designed and manufactured might be an additional clue ?