- Excellent hFE Linearity : hFE (0.1mA) hFE (2mA) =0.95(Typ.) . Designed for Complementary Use with S1420(hFE =70 700 . Small Collector Output Capacitance: C ob =4. 5pF(Max. S1423 Unit in MAXIMUM RATINGS (Ta=25°C CHARACTERISTIC Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage.