Found on 1 component on 1 board, in SMA package.
What 744B is
- 1SMA4744 - Zener diode, 15V 1W surface mount package. (SMA · on 1 of the parts below · in our catalogue with this marking)
One code, more than one part. SMD marking codes are short, and manufacturers reuse them: the same code can be a different part in a different package
(a SOT-23 transistor and a SOD-123 diode can both be marked 744B), or from a different maker. Check the package and what the part does in the circuit before replacing it.
Where it's been found
Topp Pro SOHO S12FLX - main board
Part: 1SMA4744
SMA · 15v zener diode
Marking from our stocked 1SMA4744 - not read off this one
Show on the board