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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 PDISS TJ TSTG θJC
30 V 3.5 W @ TC = 25 OC -65 OC to +200 OC -65 OC to +200 OC
50 OC/W
1 = EMITTER 2 = BASE 3 = COLLECTOR
NONE
CHARACTERISTICS TC = 25 OC
SYMBOL
TEST CONDITIONS
BVCEO
IC = 20 mA
BVCER
IC = 20 mA
RBE = 10 Ω
BVEBO
IC = 100 µA
ICEX
VCE = 55 V
VBE = -1.5 V
hFE
VCE = 5.0 V
IC = 50 mA IC = 400 mA
MINIMUM
35 55 3.5
20 5.0
ft
VCE = 20 V
IC = 50 mA
f = 200 MHz
700
COB
VCB = 28 V
f = 1.0 MHz
Pin
VCC = 28 V
f = 200 MHz
η
Pout = 750 mW Rs = 50 Ω
35
TYPICAL MAXIMUM
1.0 200
1000
1.5
3.
2N4428 Datasheet