NTE121
Germanium PNP Transistor
Audio Frequency Power Amplifier
Description:
The NTE121 is a Germanium PNP Alloy Junction transistor in a TO3 type package designed as an
audio frequency power output amplifier.
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
CollectorBase Voltage, V
CBO
60V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CollectorEmitter Voltage (R
BE
= 68
), V
CER
45V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EmitterBase Voltage, V
EBO
10V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Collector Current, I
C
10A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emitter Current, I
E
10A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Current, I
B
3A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
C
+55
C), P
D
90W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature, T
J
+100
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +100
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Matched pairs are available upon request (NTE121MP). Matched pairs have their gain
specification (h
FE
) matched to within 10% of each other.
Electrical Characteristics: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
CollectorEmitter Breakdown Voltage
V
(BR)CER
I
C(peak)
= 0.6A, R
BE
= 68
45
V
Collector Cutoff Current
I
CBO
V
CB
= 30V, I
E
= 0
0.5
mA
DC Current Gain
h
FE
V
CE
= 2V, I
C
= 20mA
50
90
165
BaseEmitter Input Voltage
V
BE
V
CE
= 2V, I
C
= 1A
0.38
V
CollectorEmitter Saturation Voltage
V
CE(sat)
I
C
= 10A, I
B
= 1A
0.3
V
Transition Frequency
f
T
V
CB
= 2V, I
E
= 1A
300
kHz
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