KST4124
KST4124
General Purpose Transistor
2
1
SOT-23
1. Base 2. Emitter 3. Collector
NPN Epitaxial Silicon Transistor
Absolute Maximum Ratings
T
a
=25°C unless otherwise noted
Symbol
V
CBO
V
CEO
V
EBO
I
C
P
C
T
STG
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current
Collector Dissipation
Storage Temperature
Parameter
Value
30
25
5
200
350
150
Units
V
V
V
mA
mW
°C
•
Refer to KST3904 for graphs
Electrical Characteristics
T
a
=25°C unless otherwise noted
Symbol
BV
CBO
BV
CEO
BV
EBO
I
CBO
I
EBO
h
FE
V
CE
(sat)
V
BE
(sat)
f
T
C
ob
NF
Parameter
Collector-Base Breakdown Voltage
* Collector-Emitter Breakdown Voltage
Emitter-Base Breakdown Voltage
Collector Cut-off Current
Emitter Cut-off Current
* DC Current Gain
* Collector-Emitter Saturation Voltage
* Base-Emitter Saturation Voltage
Current Gain Bandwidth Product
Output Capacitance
Noise Figure
Test Condition
I
C
=10µA, I
E
=0
I
C
=1.0mA, I
B
=0
I
E
=10µA, I
C
=0
V
CB
=20V, I
E
=0
V
EB
=3V, I
C
=0
V
CE
=1V, I
C
=2mA
V
CE
=1V, I
C
=50mA
I
C
=50mA, I
B
=5.0mA
I
C
=50mA, I
B
=5.0mA
I
C
=10mA, V
CE
=20V
f=100MHz
V
CB
=5V, I
E
=0, f=1.0MHz
I
C
=100µA, V
CE
=5V
R
S
=1KΩ
f=10Hz to 15.7KHz
300
4
5
120
60
Min.
30
25
5
50
50
360
0.3
0.95
V
V
MHz
pF
dB
Max.
Units
V
V
V
nA
nA
* Pulse Test: PW≤300µs, Duty Cycle≤2%
Marking
ZC
©2000 Fairchild Semiconductor International
Rev. A, February 2000
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The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
not intended to be an exhaustive list of all such trademarks.
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CoolFET™
CROSSVOLT™
E
2
CMOS™
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FACT Quiet Series™
FAST
®
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DISCLAIMER
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ISOPLANAR™
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®
QFET™
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Quiet Series™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
TinyLogic™
UHC™
VCX™
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR
INTERNATIONAL.
As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, or (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Advance Information
Product Status
Formative or In
Design
First Production
Definition
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Preliminary
No Identification Needed
Full Production
Obsolete
Not In Production
©2000 Fairchild Semiconductor International
Rev. E
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