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: (TA = +25°C unless otherwise specified)
Collector–Base Voltage, VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Collector–Emitter Voltage, VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Emitter–Base Voltage, VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Collector Current, IC
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA
Pulsed (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA
Base Current, IB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Total Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4mW/°C
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 1/16” ±1/32” from case for 10sec max.), TL . . . . . . . . +260°C
Note 1. Pulse Test: Pulse Width ≤ 300µs, Duty Cycle ≤ 2%
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ Max
Unit
Static Characteristics
Collector–Base Breakdown Voltage
Collector–Emitter Breakdown Voltage
Emitter–Base Breakdown Voltage
DC Current Gain
V
I = 0.1µA, I = 0
40
40
–
–
–
–
–
–
–
–
–
V
V
V
(BR)CBO
(BR)CEO
(BR)EBO
C
E
V
V
I = 10mA, I = 0
C B
I = 0.1µA, I = 0
12
–
E
E
h
FE
V
= 5V, I = 2mA
7000
20000
–
70000
–
CE
CE
CB
CB
C
V
V
V
= 5V, I = 100mA
C
Collector Cutoff Current
I
= 40V, I = 0
100
20
nA
CBO
E
= 40V, I = 0, T = +100°C
–
µA
E
A