FEATURES
MECHANICAL DATA
Case: TO-92 Plastic Package
Weight: approx. 0.18 g
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Small Signal Transistors (NPN)
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
BF420, BF422
Symbol Value Unit
Collector-Base Voltage BF420
BF422
V
CBO
V
CBO
300
250
V
V
Collector-Emitter Voltage BF422 V
CEO
250 V
Collector-Emitter Voltage BF420 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
NPN Silicon Epitaxial Planar Transistors
especially suited for application in class-B
video output stages of TV receivers and
monitors.
As complementary types, the PNP
transistors BF421 and BF423 are
recommended
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