®
BF421
SMALL SIGNAL PNP TRANSISTOR
PRELIMINARY DATA
Ordering Code
BF421
BF421-AP
s
Marking
BF421
BF421
Package / Shipment
TO-92 / Bulk
TO-92
/ Ammopack
s
s
SILICON EPITAXIAL PLANAR PNP HIGH
VOLTAGE TRANSISTOR
TO-92 PACKAGE SUITABLE FOR
THROUGH-HOLE PCB ASSEMBLY
THE NPN COMPLEMENTARY TYPE IS
BF420
TO-92
Bulk
TO-92
Ammopack
APPLICATIONS
s
VIDEO AMPLIFIER CIRCUITS (RGB
CATHODE CURRENT CONTROL)
s
TELEPHONE WIRELINE INTERFACE (HOOK
SWITCHES, DIALER CIRCUITS)
INTERNAL SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CBO
V
CEO
V
EBO
I
C
I
CM
P
tot
T
stg
T
j
Parameter
Collector-Base Voltage (I
E
= 0)
Collector-Emitter Voltage (I
B
= 0)
Emitter-Base Voltage (I
C
= 0)
Collector Current
Collector Peak Current (t
p
< 5ms)
Total Dissipation at T
C
= 25
o
C
Storage Temperature
Max. Operating Junction Temperature
Value
-300
-300
-5
-500
-600
830
-65 to 150
150
Unit
V
V
V
mA
mA
mW
o
o
C
C
February 2003
1/5
STMICROELECTRONICS [ STMICROELECTRONICS ]
