NTE172A
Silicon NPN Transistor
Darlington Preamp, Medium Speed Switch
Description:
The NTE172A is a silicon NPN Darlington transistor in a TO92 type case designed for preamplifier
input stages requiring input impedances of several megohms or extremely low level, high gain, low
noise amplifier applications.
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Collector鈥揃ase Voltage, V
CBO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Collector鈥揈mitter Voltage, V
CEO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Emitter鈥揃ase Voltage, V
EBO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Collector Current, I
C
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA
Pulsed (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA
Base Current, I
B
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Total Power Dissipation (T
A
= +25擄C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Derate Above 25擄C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4mW/擄C
Operating Junction Temperature Range, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +125擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Lead Temperature (During Soldering, 1/16鈥?/div>
鹵1/32鈥?/div>
from case for 10sec max.), T
L
. . . . . . . . +260擄C
Note 1. Pulse Test: Pulse Width
鈮?/div>
300碌s, Duty Cycle
鈮?/div>
2%
Electrical Characteristics:
(T
A
= +25擄C unless otherwise specified)
Parameter
Static Characteristics
Collector鈥揃ase Breakdown Voltage
Collector鈥揈mitter Breakdown Voltage
Emitter鈥揃ase Breakdown Voltage
DC Current Gain
V
(BR)CBO
I
C
= 0.1碌A, I
E
= 0
V
(BR)CEO
I
C
= 10mA, I
B
= 0
V
(BR)EBO
I
E
= 0.1碌A, I
E
= 0
h
FE
I
CBO
V
CE
= 5V, I
C
= 2mA
V
CE
= 5V, I
C
= 100mA
Collector Cutoff Current
V
CB
= 40V, I
E
= 0
V
CB
= 40V, I
E
= 0, T
A
= +100擄C
40
40
12
7000
20000
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
70000
鈥?/div>
100
20
nA
碌A
V
V
V
Symbol
Test Conditions
Min
Typ
Max
Unit
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