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                                                                                                                      2N4428

       NPN SILICON HIGH FREQUENCY TRANSISTOR



                                                                          PACKAGE STYLE TO-39



DESCRIPTION:
The 2N4428 is a High Frequency
Transistor Designed for Amplifier and
Oscillator Applications.

MAXIMUM RATINGS
  IC                  425 mA
  VCE                  30 V
                                     O
 PDISS        3.5 W @ TC = 25 C
                  O              O
 TJ           -65 C to +200 C
                  O              O
 TSTG         -65 C to +200 C                                                                           1 = EMITTER    2 = BASE
                        O                                                                                    3 = COLLECTOR
  JC              50 C/W


                                                                                                       NONE

CHARACTERISTICS                      O
                             TC = 25 C
 SYMBOL                      TEST CONDITIONS                           MINIMUM            TYPICAL        MAXIMUM           UNITS
      BVCEO    IC = 20 mA                                                   35                                                V
      BVCER    IC = 20 mA         RBE = 10                                  55                                                V
      BVEBO    IC = 100 

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