View rn4990 datasheet:

RN4990 TOSHIBA Transistor Silicon NPN Epitaxial Type (PCT Process) Silicon PNP Epitaxial Type (PCT Process) RN4990 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 Q1 Maximum Ratings (Ta = 25° °C) ° ° JEDEC ? Characteristic Symbol Rating Unit EIAJ ? TOSHIBA 2-2J1A Collector-base voltage VCBO 50 V Weight: 6.8mg Collector-emitter voltage VCEO 50 V Emitter-base voltage VEBO 5 V Collector current IC 100 mA Q2 Maximum Ratings (Ta = 25° °C) ° ° Characteristic Symbol Rating Unit Collector-b