View 2sd2357 e datasheet:

Transistor 2SD2357 Silicon NPN epitaxial planer type For low-frequency amplification Unit: mm Complementary to 2SB1537 1.5± 0.1 4.5± 0.1 1.6± 0.2 Features Low collector to emitter saturation voltage VCE(sat). Large collector power dissipation PC. 45° Mini Power type package, allowing downsizing of the equipment and automatic insertion through the tape packing and the maga- 0.4± 0.08