2SC2178

      2SC2178 is a kind of silicon NPN epitaxial planar type.It is widely used in the VHF band power amplifier.Here you can some information about the features.First,the minimum output power (P_O) is 15 W (f=175 MHz,V_CC=12.5 V,P_i=1.3 W).Secondly,it is 100% tested for load mismatch stress at all phase angles with 30:1 VSWR @ V_CC=15 V,P_i=1.3 W,f=175 MHz.
      The following is about the maximum ratings of 2SC2178 at Ta=25.The collector-base voltage (V_CBO) is 35 V.The collector-emitter voltage (V_CEO) is 18 V.The emitter-base voltage (V_EBO) is 3.5 V.The collector current (I_C) is 3.5 A.The collector power dissipation (P_C) is 35 W at TC=25.The junction temperature is 175.The storage temperature is (T_stg) from -65 to +175.
      What comes next is about the electrical characteristics of 2SC2178 at Ta=25.The maximum collector cutoff current (I_CBO) is 1.0 mA at V_CB=15 V and I_E=0.Then is about the DC current gain (h_FE).The minimum h_FE is 10  at V_CE=5 V and I_C=1 A.The maximum output capacitance (c_ob) is 80 pF at V_CB=10 V,f=1 MHz,I_E=0.The minimum collector to base breakdown voltage (V_(BR)CBO) is 35 V at I_C=10 mA,I_E=0.The minimum collector to emitter breakdown voltage (V_(BR)CEO) is 18 V at I_C=25 mA,I_B=0.The minimum emitter to base breakdown voltage (V_(BR)EBO) is 3.5 V at I_C=0,I_E=1 mA.The minimum output power (P_O) is 15 W and the maximum is 18 W at V_CC=12.5 W,f=175 MHz,P_i=1.3 W.The typical series equivalent input impendance (Z_in) is 1.25+j0.6 and the typical series equivalent input impendance (Z_OUT) is 4.9-j0.3 at V_CC=12.5 W,f=175 MHz,P_O=15 W.