UN121F Datasheet and Replacement

   Type Designator: UN121F
   Material of Transistor: Si
   Polarity: Pre-Biased-NPN
   Built in Bias Resistor R1 = 4.7 kOhm
   Built in Bias Resistor R2 = 10 kOhm
   Typical Resistor Ratio R1/R2 = 0.47
   Maximum Collector Power Dissipation (Pc): 0.4 W
   Maximum Collector-Base Voltage |Vcb|: 50 V
   Maximum Collector-Emitter Voltage |Vce|: 50 V
   Maximum Emitter-Base Voltage |Veb|: 6 V
   Maximum Collector Current |Ic max|: 0.1 A
   Max. Operating Junction Temperature (Tj): 150 °C
   Transition Frequency (ft): 80 MHz
   Forward Current Transfer Ratio (hFE), MIN: 30
   Noise Figure, dB: -
   Package: M-A1
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