component
TO-92
UnreviewedClassic through-hole transistor — the most iconic small-signal package
TO-92
The TO-92 is the most recognizable through-hole transistor package, with its distinctive semicircular cross-section. Three inline leads at 1.27mm pitch house small-signal BJTs (2N2222, 2N3904), voltage references (LM385), temperature sensors (DS18B20), and small MOSFETs. At roughly 4.2 x 3.8mm, the molded epoxy body provides basic power dissipation up to 625mW. The 3D model shows the flat face with part marking and curved back.