View 2sc4005 datasheet:

Ordering number:EN2271A NPN Planar Type Silicon Darlington Transistor 2SC4005 Driver Applications Applications Package Dimensions · Suitable for use in switching of L load (motor unit:mm drivers, printer hammer drivers, relay drivers). 2041A [2SC4005] 4.5 10.0 Features 2.8 3.2 · High DC current gain. · Large current capacity and wide ASO. · On-chip Zener diode of 50± 8V between collector and base. · Uniformity in collector-to-base breakdown voltage 2.4 1.6 due to accurate impurity diffusion process. 1.2 · Large inductive load handling capability. 0.7 0.75 · Micaless package facilitating mounting. 1 2 3 1 : Base 2.55 2.55 2 : Collector 3 : Emitter 2.55 2.55 SANYO : TO-220ML Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Condi