FEATURES
MECHANICAL DATA
Case: TO-92 Plastic Package
Weight: approx. 0.18 g
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Small Signal Transistors (PNP)
C
BE
.181 (4.6)
mi
n. .492
(
12.5)
.181 (
4
.6)
.142 (3.6)
Dimensions in inches and (millimeters)
TO-92
Ratings at 25 °C

ambient temperature unless otherwise specified
.098 (2.5)
max
.
∅ .022 (0.55)
4/98
Symbol Value Unit
Collector-Base Voltage BF421
BF423
–V
CBO
–V
CBO
300
250
V
V
Collector-Emitter Voltage BF423 –V
CEO
250 V
Collector-Emitter Voltage BF421 –V
CER
300 V
Emitter-Base Voltage –V
EBO
5V
Collector Current –I
C
50 mA
Peak Collector Current –I
CM
100 mA
Power Dissipation at T
amb
= 25 °C P
tot
830
1)
mW
Junction Temperature T
j
150 °C
Storage Temperature Range T
S
–65 to +150 °C
1)
Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case.
PNP Silicon Epitaxial Transistors
especially suited for application in
class-B video output stages of TV
receivers and monitors.
As complementary types, the NPN tran-
sistors BF420 and BF422 are recom-
mended.
♦
♦
BF421, BF423