BF494B Philips Semiconductors, BF494B Datasheet - Page 3

• Manufacturer Part Number: BF494B
• Description: NPN medium frequency transistors
• Manufacturer: Philips Semiconductors

Philips Semiconductors
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Note
1. Transistor mounted on an FR4 printed-circuit board.
THERMAL CHARACTERISTICS
Note
1. Transistor mounted on an FR4 printed-circuit board.
CHARACTERISTICS
T
1997 Jul 08
V
V
V
I
I
P
T
T
T
R
I
I
h
V
C
f
SYMBOL
SYMBOL
SYMBOL
C
CM
amb
CBO
EBO
T
FE
stg
j
amb
CBO
CEO
EBO
tot
BE
th j-a
re
NPN medium frequency transistors
= 25 C unless otherwise specified.
collector-base voltage
collector-emitter voltage
emitter-base voltage
collector current (DC)
peak collector current
total power dissipation
storage temperature
junction temperature
operating ambient temperature
thermal resistance from junction to ambient
collector cut-off current
emitter cut-off current
DC current gain
base-emitter voltage
feedback capacitance
transition frequency
BF494
BF494B
BF495
BF495B
PARAMETER
PARAMETER
PARAMETER
I
I
I
I
I
I
I
E
E
C
C
C
C
C
= 0; V
= 0; V
= 0; V
= 1 mA; V
= 1 mA; V
= 0; V
= 1 mA; V
CB
CB
open emitter
open base
open collector
T
EB
CB
amb
= 20 V
= 20 V; T
= 4 V
= 10 V; f = 1 MHz
CE
CE
CE
CONDITIONS
3
note 1
= 10 V
= 10 V
= 10 V; f = 100 MHz
25 C; note 1
CONDITIONS
CONDITIONS
amb
= 150 C
67
100
35
100
650
120
65
65
MIN.
MIN.
VALUE
420
BF494; BF495
Product specification
30
20
5
30
30
300
+150
150
+150
100
4
100
220
220
125
125
740
1
MAX.
MAX.
UNIT
K/W
V
V
V
mA
mA
mW
nA
nA
mV
MHz
pF
C
C
C
A
UNIT
UNIT