View 2sc2412k datasheet:

2SC2412K / 2SC4081 / 2SC4617 / 2SC4617H / 2SC1740S Transistors General Purpose Transistor (50V, 0.15A) 2SC2412K / 2SC4081 / 2SC4617 / 2SC4617H / 2SC1740S Features External dimensions (Units : mm) 1) Low Cob. Cob=2.0pF (Typ.) 2SC2412K 2SC4081 2SC4617 2) Complements the 2SA1037AK / 1.6±0.2 2.9±0.2 +0.2 2.0±0.2 1.1 1.0±0.1 1.9±0.2 -0.1 1.3±0.1 0.9±0.1 0.8±0.1 0.50.5 0.7±0.1 2SA1576A / 2SA1774 / 0.95 0.95 0.65 0.65 0.2 0.7±0.1 +0.1 +0.1 0.2-0.05 0.2-0.05 0.55±0.1 (1) (2) (1) (2) 0~0.1 (1) (2) 2SA1774H / 2SA933AS. 0~0.1 0~0.1 (3) (3) (3) All terminals have All terminals have same dimensions +0.1 same dimensions +0.1 0.3-0.05 0.15±0.05 0.15 0.3+0.1 0.15±0.05 0.4+0.1 -0.06 -0 -0.05 (1) Emitter (1) Emitter Structure (1) Emitter ROHM : SMT3 (2) Base (2)