View 2sd1685 datasheet:

Ordering number:EN2042A NPN Epitaxial Planar Silicon Transistor 2SD1685 20V/5A Switching Applications Applications Package Dimensions · Strobe, voltage regulators, relay drivers, lamp unit:mm drivers. 2042B [2SD1685] 8.0 Features 4.0 3.3 1.0 1.0 · Low saturation voltage. · Large current capacity. 3.0 · Fast switching time. · No insulator required when mounting because the 1.6 leadframe of the chip is covered with plastic. 0.8 0.8 0.75 0.7 1 : Emitter 1 2 3 2 : Collector 3 : Base 2.4 4.8 SANYO : TO-126ML Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 60 V Collector-to-Emitter Voltage VCEO 20 V Emitter-to-Base Voltage VEBO 6 V Collector Current IC 5 A Collector Current (Pu