2sc3438.pdf datasheet:

SMD Type TransistorsNPN Transistors2SC34381.70 0.1 Features High Voltage VCEO = 100V High Collector Current (ICM = 800mA) High Collector Dissipation PC = 500mW Small Package For Mounting0.42 0.10.46 0.1 Complementary to 2SA13681.Base2.Collector3.Emitter Absolute Maximum Ratings Ta = 25Parameter Symbol Rating Unit Collector - Base Voltage VCBO 100 Collector - Emitter Voltage VCEO 100 V Emitter - Base Voltage VEBO 5 Collector Current - Continuous IC 500mA Peak Collector Current ICM 800 Collector Power Dissipation PC 500 mW Junction Temperature TJ 150 Storage Temperature Range Tstg -55 to 150 Electrical Characteristics Ta = 25Parameter Symbol Test Conditions Min Typ Max Unit Collector- base breakdown voltage VCBO Ic= 100 A IE= 0 100 Collector- emitter breakdown voltage VCEO Ic= 1 mAR