I have a circuit board I am trying to analyze and trace, and there are two components that I am sure are transistors, but I can't find any datasheets based on these markings (Google or otherwise). The are very small surface mounted rectangular devices, with 2 pins on one side, and a single pin on the other side. The markings on one are "S1A 72", and on the other is "W21 74". In each case, the last two numbers (72 and 74) are written sideways along the short side of the rectangle, while the other markings are written along the long side of the rectangle.
If anyone can direct me to a datasheet of these items, that would be most appreciated.
If anyone can direct me to a datasheet of these items, that would be most appreciated.