CYStech Electronics Corp.
Spec. No. : C235A3
Issued Date : 2004.02.24
Revised Date : 2004.10.18
Page No. : 1/3
BF423A3/S CYStek Product Specification
PNP Epitaxial Planar Transistor
BF423A3/S
Description
• PNP high voltage transistors in a TO-92 plastic package.
• Complementary to BF422A3/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 VCBO Open emitter - -250 V
Collector-Emitter Voltage VCEO Open base - -250 V
Emitter-Base Voltage VEBO Open collector - -5 V
Collector Current (DC) IC - -50 mA
Peak Collector Current ICM - -100 mA
Peak Base Current IBM - -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.
BF423A3/S
TO-92
B：Base
C：Collector
E：Emitter
E C B
CYStech Electronics Corp.
Spec. No. : C235A3
Issued Date : 2004.02.24
Revised Date : 2004.10.18
Page No. : 2/3
BF423A3/S CYStek Product Specification
Characteristics (Ta=25°C)
Symbol Min. Typ. Max. Unit Test Conditions
BVCBO -250 - - V IC=-100µA, IE=0
BVCEO -250 - - V IC=-1mA, IB=0
BVEBO -5 - - V IE=-10µA, IC=0
- - -10 nA VCB=-200V, IE=0
ICBO - - -10 µA
IE=0, VCB=-200V, Tj=150℃
IEBO - - -50 nA VEB=-5V, IC=0
*VCE(sat) - - -0.6 V IC=-30mA, IB=-5mA
*hFE 50 - - - VCE=-20V, IC=-25mA
Cre - - 1.6 pF IC=iC=0, VCE=-30V, f=1MHz
fT 60 - - MHz VCE=-10V, IC=-10mA, f=100MHz
*Pulse Test: Pulse Width ≤380µs, Duty Cycle≤2%
Thermal Characteristics
Symbol Parameter Conditions Value Unit
RthJA Thermal resistance from junction to ambient Note 150 K/W
Note : Transistor mounted on a printed-circuit board.
Ordering Information
Device Package Shipping
BF423A3 TO-92 2000 pcs / tape & box
BF423A3S TO-92
(Pb-free)
2000 pcs / tape & box
CYStech Electronics Corp.
Spec. No. : C235A3
Issued Date : 2004.02.24
Revised Date : 2004.10.18
Page No. : 3/3
BF423A3/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 α1 - *5° - *5°
E - *0.0500 - *1.27 α2 - *2° - *2°
F 0.1323 0.1480 3.36 3.76 α3 - *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.
BF423
Marking:
31
A
D
B
C
Iα1
E
F
α2
α3
G
H
2
St
y
le: Pin 1.Emitter 2.Collector 3.Base
3-Lead TO-92 Plastic Package
CYStek Packa
g
e Code:
A
3
