FEATURES
MECHAN IC AL DATA
Case: TO -92 Plasti c Package
Weight: approx. 0.18 g
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Small Signal Transistors (PNP)
C
B
E
.181 (4.6)
min. .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 –VCBO
–VCBO 300
250 V
V
Collector-Emitter Voltage BF423 –VCEO 250 V
Collector-Emitter Voltage BF421 –VCER 300 V
Emitter-Base Voltage –VEBO 5V
Collector Current –IC50 mA
Peak Collector Current –ICM 100 mA
Pow e r Dissipation at Tamb = 25 °C Ptot 8301) mW
Junction Temperature Tj150 °C
Storage Temperature Range TS–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
recei v ers and monitors .
As complementary t ypes, the NPN tran-
sistors BF420 and BF422 are recom-
mended.
♦
♦
BF421, BF423
ELECTRICAL CHARACTERISTICS
Ratings at 25 °C ambient temperature unless otherwise specified
Symbol Min. Typ. Max. Unit
Collec tor-Base Breakdown Voltage BF421
at –IC = 100 µA, IE = 0 BF423 –V(BR)CBO
–V(BR)CBO 300
250 –
––
–V
V
Collector-Emitter Breakdown Voltage BF423
at –IC = 10 mA, IB = 0 –V(BR)CEO 250 – – V
Collector-Emitter Breakdown Voltage BF421
at RBE = 2.7 kΩ, at –IC = 10 mA –V(BR)CER 300––V
Emitter -B ase Breakdown Volt age
at –IE = 100 µA, IC = 0 –V(BR)EBO 5––V
Collector-Base Cutoff Current
at –VCB = 200 V, IE = 0 –ICBO ––10nA
Co llec tor-Emitter Cutoff Current
at RBE = 2.7 kΩ, –VCE = 250 V
at RBE = 2.7 kΩ, –VCE = 200 V, Tj = 150 °C –ICER
–ICER 50
10 nA
µA
Collector Saturation Voltage
at –IC = 30 mA, –IB = 5 mA –VCEsat ––0.8V
DC Current Gain
at –VCE = 20 V, –IC = 25 mA hFE 50–––
Gain-Bandwidth Product
at –VCE = 10 V, –IC = 10 mA fT60––MHz
Feedback Capacitance
at –VCE = 30 V, –IC = 0, f = 1 MHz Cre ––1.6pF
Thermal Resist ance Junction to Ambient Air RthJA – – 1501) K/W
1) Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case.
BF421, BF423
