TOSHIBA Transistor Silicon PNP Epitaxial Type 2SA1837 Power Amplifier Applications Driver Stage Amplifier Applications 2SA1837 Unit: mm High transition frequency: fT = 70 MHz (typ.) Complementary to 2SC4793 Maximum Ratings (Tc = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Ta = 25°C Tc = 25°C Junction temperature Storage temperature range Symbol VCBO VCEO VE.