SMD Type
NPN Medium Frequency Transistor
BF840
SOT-23
+0.1
2.9
-0.1
+0.1
0.4
-0.1
Transistors
IC
Unit: mm
+0.1
2.4
-0.1
1
2
Low voltage (max. 40 V).
0.95
+0.1
-0.1
+0.1
1.9
-0.1
0.55
Low current (max. 25 mA).
+0.1
1.3
-0.1
Features
0.4
3
+0.05
0.1
-0.01
0.97
+0.1
0.38
-0.1
+0.1
-0.1
1.Base
2.Emitter
3.collector
Absolute Maximum Ratings Ta = 25
Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
Peak collector current
Total power dissipation *
Storage temperature
Junction temperature
Operating ambient temperature
Thermal resistance from junction to ambient *
* Transistor mounted on an FR4 printed-circuit board.
Symbol
V
CBO
V
CEO
V
EBO
I
C
I
CM
P
tot
T
stg
T
j
R
amb
R
th j-a
Rating
40
40
4
25
25
250
-65 to +150
150
-65 to +150
500
K/W
Unit
V
V
V
mA
mA
mW
Electrical Characteristics Ta = 25
Parameter
Collector cutoff current
Emitter cutoff current
DC current gain
Base to emitter voltage
Feedback capacitance
Transition frequency
Symbol
I
CBO
I
EBO
h
FE
V
BE
C
re
f
T
Testconditons
I
E
= 0; Vc
B
= 20 V
Ic = 0; V
EB
= 4 V
Ic = 1 mA; Vc
E
= 10 V
Ic = 1 mA; Vc
E
= 10 V
Ic = 0; Vc
B
= 10 V; f = 1 MHz
Ic = 1 mA; Vc
E
= 10 V; f = 100 MHz
67
675
725
0.3
380
Min
Typ
Max
100
100
222
775
mV
pF
MHz
Unit
nA
nA
Marking
Marking
NC
0-0.1
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