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Электронный компонент: BF420A3S

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CYStech Electronics Corp.

Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date :
2004.10.18
Page No. : 1/4
BF420A3/S
CYStek Product Specification

NPN Epitaxial Planar Transistor
BF420A3/S
Description
NPN high voltage transistors in a TO-92 plastic package.
Complementary to BF421A3/S.
Pb-free package is available
Features
Low feedback capacitance.
Applications
Class-B video output stages in color television and professional monitor equipment.
Symbol Outline

Absolute Maximum Ratings
(Ta=25
C)
Parameter Symbol
Conditions
Min
Max
Unit
Collector-Base Voltage
V
CBO
Open
emitter 300 V
Collector-Emitter Voltage
V
CEO
Open
base
300
V
Emitter-Base Voltage
V
EBO
Open
collector 5 V
Collector Current (DC)
I
C
50
mA
Peak Collector Current
I
CM
100
mA
Peak Base Current
I
BM
50
mA
Power Dissipation;
Pd
Tamb
25 ;
Note
830
mW
Junction Temperature
Tj
150
C
Storage Temperature
Tstg
-65
+150
C
Operating Ambient Temperature
Tamb
-65
+150
C
Note : Transistor mounted on a printed-circuit board.
BF420A3/S
TO-92
BBase
CCollector
EEmitter
E C B
CYStech Electronics Corp.

Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date :
2004.10.18
Page No. : 2/4
BF420A3/S
CYStek Product Specification

Characteristics
(Ta=25
C)
Symbol Min.
Typ.
Max.
Unit
Test
Conditions
BV
CBO
300 -
- V I
C
=100A
BV
CEO
300 -
- V
I
C
=1mA
BV
EBO
5 - - V
I
E
=10A
- - 10
nA
I
E
=0, V
CB
=200V
I
CBO
- - 10
A
I
E
=0, V
CB
=200V, Tj=150
I
EBO
- - 50
nA
I
C
=0, V
EB
=5V
*V
CE(sat)
- - 0.6 V
I
C
=30mA, I
B
=5mA
*h
FE
50 - - -
V
CE
=20V, I
C
=25mA
Cre - - 1.6
pF
I
C
=i
C
=0, V
CE
=30V, f=1MHz
f
T
60 - -
MHz
V
CE
=10V, I
C
=10mA, f=100MHz
*Pulse Test: Pulse Width
380s, Duty Cycle
2%
Thermal Characteristics
Symbol Parameter Conditions
Value
Unit
R
thJA
Thermal resistance from junction to ambient
Note
150
K/W
Note : Transistor mounted on a printed-circuit board

Ordering Information
Device Package Shipping
BF420A3
TO-92
2000 pcs / tape & box
BF420A3S TO-92
(Pb-free)
2000 pcs / tape & box












CYStech Electronics Corp.

Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date :
2004.10.18
Page No. : 3/4
BF420A3/S
CYStek Product Specification

Characteristic Curves
Current Gain vs Collector Current
10
100
1000
1
10
100
Collector Current---IC(mA)
Current Gain---HFE
VCE = 5V
VCE = 10V
VCE = 20V
Saturation Voltage vs Collector Current
10
100
1000
10000
1
10
100
Collector Current---IC(mA)
Saturation Voltage---(mV)
VCE(SAT) @ IC = 10IB
VCE(SAT) @ IC = 20IB
Saturation Voltage vs Collector Current
100
1000
1
10
100
Collector Current---IC(mA)
Saturation Voltage---(mV)
VBE(SAT) @ IC =10IB
Power Derating Curve
0
100
200
300
400
500
600
700
800
900
0
50
100
150
200
Ambient Temperature---TA()
Power Dissipation---PD(mW)
CYStech Electronics Corp.

Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date :
2004.10.18
Page No. : 4/4
BF420A3/S
CYStek Product Specification

TO-92 Dimension
*: Typical
Inches Millimeters
Inches Millimeters
DIM
Min. Max. Min. Max.
DIM
Min. Max. Min. Max.
A 0.1704
0.1902 4.33 4.83 G 0.0142
0.0220 0.36 0.56
B 0.1704
0.1902 4.33 4.83 H
-
*
0.1000 -
*
2.54
C 0.5000 - 12.70 -
I
-
*
0.0500 -
*
1.27
D 0.0142
0.0220 0.36 0.56
1
-
*
5
-
*
5
E -
*
0.0500 -
*
1.27
2
-
*
2
-
*
2
F 0.1323
0.1480 3.36 3.76
3
-
*
2
-
*
2
Notes:
1.Controlling dimension: millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
Lead: 42 Alloy ; solder plating
Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
CYStek reserves the right to make changes to its products without notice.
CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.

BF420
Marking:
3
1
A
D
B
C
I
1
E
F
2
3
G
H
2
Style: Pin 1.Emitter 2.Collector 3.Base
3-Lead TO-92 Plastic Package
CYStek Package Code: A3