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BEFORE THE PRODUCT(S) DESCRIBED HEREIN ARE WRITTEN INTO SPECIFICATIONS, OR USED IN CRITICAL APPLICATIONS,
THAT THE PERFORMANCE CHARACTERISTICS BE VERIFIED BY CONTACTING THE FACTORY.
GHz Technology Inc. 3000 Oakmead Village Drive, Santa Clara, CA 95051-0808 Tel. 408 / 986-8031 Fax 408 / 986-8120
2A5/2A5A
0.5 Watts, 20 Volts, Class A 
Linear to 2000 MHz
GENERAL DESCRIPTION
The 2A5/2A5A is a COMMON EMITTER transistor capable of providing 0.5
Watt of Class A, RF output power to 2000 MHz.  This transistor is specifically
designed for general Class A amplifier applications.  It utilizes gold
metalization and diffused ballasting to provide high reliability and supreme
ruggedness.
CASE OUTLINE
2A5 - 55ET, STYLE 2
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25 C                                  5.3 Watts
Maximum Voltage and Current
BVces              Collector to Emitter Voltage                          50  Volts
BVebo             Emitter to Base Voltage                                 3.5 Volts
Ic                     Collector Current                                      300 mAmps 
Maximum Temperatures
Storage Temperature                                                  - 65 to + 150 C
Operating Junction Temperature                                           + 200 C                  
2A5A - 55EU, STYLE 2
ELECTRICAL CHARACTERISTICS  @ 25 C
O
SYMBOL
CHARACTERISTICS
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Pout
Pin
Pg
Ft
VSWR
Power Out 
Power Input
Power Gain
Transition Frequency
Load Mismatch Tolerance
F = 2000 MHz
Ic  = 140 mA
Vcc = 20 Volts
Vce = 20 V, Ic = 140 A
0.5
7.0
3.4
0.8
9.0
3.7
0.1
30:1
Watts
Watts
dB
GHz
BVebo
BVces
BVceo 
h  
Cob
θ
jc
Emitter to Base Breakdown 
Collector to Emitter Breakdown
Collector to Emitter Breakdown
DC Current Gain 
Capacitance
Thermal Resistance 
Ie = 1 mA
Ic =10 mA
Ic = 10 mA
Vce = 5 V, Ic = 100 mA
Vcb = 28V, f  = 1 MHz 
3.5
50
22
20
2.0
30
3.0
33
Volts
Volts
Volts
pF
C/W
o
Issue August 1996