CYStech Electronics Corp.
NPN Epitaxial Planar Transistor
Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date : 2004.10.18
Page No. : 1/4
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
Symbol
•
Class-B video output stages in color television and professional monitor equipment.
Outline
BF420A3/S
TO-92
B：Base
C：Collector
E：Emitter
ECB
Absolute Maximum Ratings
(Ta=25°C)
Parameter
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current (DC)
Peak Collector Current
Peak Base Current
Power Dissipation;
Junction Temperature
Storage Temperature
Operating Ambient Temperature
BF420A3/S
Symbol
V
CBO
V
CEO
V
EBO
I
C
I
CM
I
BM
Pd
Tj
Tstg
Tamb
Conditions
Open emitter
Open base
Open collector
Min
Tamb≤25℃ ;
Note
-65
-65
Max
300
300
5
50
100
50
830
150
+150
+150
Unit
V
V
V
mA
mA
mA
mW
°C
°C
°C
Note : Transistor mounted on a printed-circuit board.
CYStek Product Specification
CYStech Electronics Corp.
Characteristics
(Ta=25°C)
Symbol
BV
CBO
BV
CEO
BV
EBO
I
CBO
I
EBO
*V
CE(sat)
*h
FE
Cre
f
T
Min.
300
300
5
-
-
-
-
50
-
60
Typ.
-
-
-
-
-
-
-
-
-
-
Max.
-
-
-
10
10
50
0.6
-
1.6
-
Unit
V
V
V
nA
µA
nA
V
-
pF
MHz
Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date : 2004.10.18
Page No. : 2/4
Test Conditions
I
C
=100µA
I
C
=1mA
I
E
=10µA
I
E
=0, V
CB
=200V
I
E
=0, V
CB
=200V, Tj=150
℃
I
C
=0, V
EB
=5V
I
C
=30mA, I
B
=5mA
V
CE
=20V, I
C
=25mA
I
C
=i
C
=0, V
CE
=30V, f=1MHz
V
CE
=10V, I
C
=10mA, f=100MHz
*Pulse Test: Pulse Width
≤380µs,
Duty Cycle≤2%
Thermal Characteristics
Symbol
R
thJA
Parameter
Thermal resistance from junction to ambient
Conditions
Note
Value
150
Unit
K/W
Note : Transistor mounted on a printed-circuit board
Ordering Information
Device
BF420A3
BF420A3S
Package
TO-92
TO-92
(Pb-free)
Shipping
2000 pcs / tape & box
2000 pcs / tape & box
BF420A3/S
CYStek Product Specification
CYStech Electronics Corp.
Characteristic Curves
Current Gain vs Collector Current
1000
Saturation Voltage---(mV)
10000
Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date : 2004.10.18
Page No. : 3/4
Saturation Voltage vs Collector Current
Current Gain---HFE
1000
VCE(SAT) @ IC = 20IB
100
VCE = 20V
VCE = 10V
VCE = 5V
100
VCE(SAT) @ IC = 10IB
10
1
10
Collector Current---IC(mA)
100
10
1
10
Collector Current---IC(mA)
100
Saturation Voltage vs Collector Current
1000
Power Dissipation---PD(mW)
Power Derating Curve
900
800
700
600
500
400
300
200
100
0
0
50
100
150
200
Saturation Voltage---(mV)
VBE(SAT) @ IC =10IB
100
1
10
Collector Current---IC(mA)
100
Ambient Temperature---TA(℃)
BF420A3/S
CYStek Product Specification
CYStech Electronics Corp.
TO-92 Dimension
Spec. No. : C234A3-A
Issued Date : 2004.03.02
Revised Date : 2004.10.18
Page No. : 4/4
A
B
1
2
3
α
2
Marking:
BF420
α
3
C
D
H
I
E
F
G
Style: Pin 1.Emitter 2.Collector 3.Base
3-Lead TO-92 Plastic Package
CYStek Package Code: A3
α
1
*: Typical
DIM
A
B
C
D
E
F
Inches
Min.
Max.
0.1704 0.1902
0.1704 0.1902
0.5000
-
0.0142 0.0220
-
*
0.0500
0.1323 0.1480
Millimeters
Min.
Max.
4.33
4.83
4.33
4.83
12.70
-
0.36
0.56
-
*
1.27
3.36
3.76
DIM
G
H
I
α1
α2
α3
Inches
Min.
Max.
0.0142 0.0220
-
*
0.1000
-
*
0.0500
-
*
5°
-
*
2°
-
*
2°
Millimeters
Min.
Max.
0.36
0.56
-
*
2.54
-
*
1.27
-
*
5°
-
*
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.
BF420A3/S
CYStek Product Specification
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