View rn4905 datasheet:

RN4905 TOSHIBA Transistor Silicon PNP Epitaxial Type (PCT Process) Silicon NPN Epitaxial Type (PCT Process) RN4905 Switching, Inverter Circuit, Interface Circuit Unit: mm And Driver Circuit Applications Includeing two devices in US6 (ultra super mini type with 6 leads) With built-in bias resistors Simplify circuit design Reduce a quantity of parts and manufacturing process Equivalent Circuit and Bias Resister Values R1: 2.2k? R2: 47k? (Q1, Q2 Common) Q1 Maximum Ratings (Ta = 25° °C) ° ° Characteristic Symbol Rating Unit JEDEC ? EIAJ ? Collector-base voltage VCBO -50 V TOSHIBA 2-2J1A Collector-emitter voltage VCEO -50 V Weight: 6.8mg Emitter-base voltage VEBO -5 V Collector current IC -100 mA Q2 Maximum Ratings (Ta = 25° °C) ° °