Page 1
KST4401
KST4401
Switching Transistor
3
2
SOT-23
1
1. Base 2. Emitter 3. Collector
NPN Epitaxial Silicon Transistor
Absolute Maximum Ratings
Symbol Parameter Value Units
V
V
V
I
P
T
CBO
CEO
EBO
C
C
STG
Collector-Base Voltage 60 V
Collector-Emitter Voltage 40 V
Emitter-Base Voltage 6 V
Collector Current 600 mA
Collector Dissipation 350 mW
Storage Temperature 150 °C
Electrical Characteristics
Symbol Parameter Test Condition Min. Max. Units
BV
CBO
BV
CEO
BV
EBO
I
BEV
I
CEX
h
FE
(sat) * Collector-Emitter Saturation Voltage IC=150mA, IB=15mA
V
CE
(sat) * Base-Emitter Sa turation Voltage IC=150mA, IB=15mA
V
BE
f
T
C
ob
t
ON
t
OFF
* Pulse Test: Pulse Width≤300µs, Duty Cycle≤2%
Collector-Base Breakdown Voltage IC=100µA, IE=0 60 V
* Collector-Emitter Breakdown Voltage IC=1.0mA, IB=0 40 V
Emitter-Base Breakdown Voltage IE=100µA, IC=0 6 V
Base Cut-off Curren t VCE=35V, VEB=0.4V 100 nA
Collector Cut-off Current VCE=35V, VEB=0.4V 100 nA
* DC Current Gain VCE=1V, IC=0.1mA
Current Gain Bandwidth Product IC=20mA, VCE=10V
Output Capaci tance VCB=5V, IE=0, f=100KHz 6.5 pF
Turn On Time VCC=30V, VBE=2V
Turn Off Time VCC=30V, IC=150mA
Ta=25°C unless otherwise noted
Ta=25°C unless otherwise noted
=1V, IC=1mA
V
CE
V
=1V, IC=10mA
CE
=1V, IC=150mA
V
CE
=2V, IC=500mA
V
CE
=500mA, IB=50mA
I
C
=500mA, IB=50mA
I
C
f=100MHz
=150mA, IB1=15mA
I
C
=15mA
I
B1=IB2
20
40
80
100
40
0.75 0.95
250 MHz
300
0.4
0.75
1.2
35 ns
255 ns
V
V
V
V
Marking
2X
©2002 Fairchild Semiconductor Corporation Rev. A2, November 2002
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Typical Characteristics
KST4401
1000
VCE = 1V
100
, DC CURRENT GAIN
FE
h
10
1 10 100 1000
IC[mA], COLLECTOR CURRENT
Figure 1. DC current Gain Figure 2. Collector-Emitter Saturation Voltage
10
[pF], CAPACITANCE
cb
C
IE = 0
f = 100KHz
10
1
VBE(sat)
0.1
(sat)[V], SATURATION VOLTAGE
CE
(sat), V
BE
V
0.01
1 10 100 1000
VCE(sat)
IC = 10 I
B
IC[mA], COLLECTOR CURRENT
Base-Emitter Saturation Voltage
10000
VCE = 10V
1000
[MHz],
T
f
100
1
1 10 100
VCB [V], COLLECTOR-BASE VOLTAGE
CURRENT GAIN BANDWIDTH PRODUCT
10
1 10 100
IC[mA], COLLECTOR CURRENT
Figure 3. Collector-Base Capacitance Figure 4. Current Gain Bandwidth Product
©2002 Fairchild Semiconductor Corporation Rev. A2, November 2002
Page 3
Package Dimensions
0.40
±0.03
KST4401
SOT-23
0.20 MIN
0.45~0.60
0.95
2.90
±0.03
1.90
±0.10
0.95
±0.03
±0.03
±0.10
0.40
±0.03
0.97REF 1.30
0.508REF
±0.10
2.40
0.96~1.14
0.03~0.10
0.38 REF
+0.05
0.12
–0.023
Dimensions in Millimeters
©2002 Fairchild Semiconductor Corporation Rev. A2, November 2002
Page 4
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®
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C™
I
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®
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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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NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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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
CORPORATION.
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 Product Status Definition
Advance Information Formative or In
Design
Preliminary First Production This dat asheet contains preliminary data, and
No Identification Needed Full Production This datasheet contains final specifications. Fairchild
Obsolete Not In Production This datasheet contains specifications on a product
©2002 Fairchild Semiconductor Corporation Rev. I1
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
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.
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
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