2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
Transistors
High-Frequency Amplifier Transistor
(18V, 50mA, 1.5GHz)
2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
!
Features
1) High transition frequency. (Typ. f
T
= 1.5GHz)
2) Small rbb’⋅Cc and high gain. (Typ. 6ps)
3) Small NF.
!
External dimensions
(Units : mm)
2SC5661
0.2
1.2
0.8
(2)
(3)
(1)
0.2
1.2
0.32
0.4 0.4
0.5
0.22
0.8
0.15Max.
!
Absolute maximum ratings
(Ta=25°C)
Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
2SC5661, 2SC4725
Collector power
dissipation
2SC4082, 2SC3837K
Junction temperature
Storage temperature
Symbol
V
CBO
V
CEO
V
EBO
I
C
P
C
Tj
Tstg
Limits
30
18
3
50
0.15
0.2
150
−55~+150
Unit
V
V
V
mA
W
°C
°C
ROHM : VMT3
(1) Base
(2) Emitter
(3) Collector
(1)
(2)
0.2
0.5 0.5
2SC4725
0.3
(3)
0.13
0to0.1
1.0
0.8
1.6
0.15
0.2
1.6
0.1Min.
(1)
2SC4082
Type
Package
h
FE
Marking
Code
Basic ordering unit
(pieces)
∗
Denotes h
FE
0to0.1
ROHM : EMT3
EIAJ : SC-75A
(1) Emitter
(2) Base
(3) Collector
0.55
0.65 0.65
(3)
2SC5661
VMT3
NP
AC
∗
T2L
8000
2SC4725
EMT3
NP
AC
∗
TL
3000
2SC4082
UMT3
NP
1C
∗
T106
3000
2SC3837K
SMT3
NP
AC
∗
T146
3000
0.3
!
Packaging specifications and h
FE
1.25
2.1
(2)
1.3
2.0
0.7
0.1to0.4
0to0.1
ROHM : UMT3
EIAJ : SC-70
(1) Emitter
(2) Base
(3) Collector
0.15
0.2
Each lead has same dimensions
(1)
2SC3837K
0.4
(3)
1.6
2.8
0.95 0.95
1.9
2.9
(2)
0.7
0.9
0.3to0.6
0to0.1
ROHM : SMT3
EIAJ : SC-59
Each lead has same dimensions
!
Electrical characteristics
(Ta=25°C)
Parameter
Collector-base breakdown voltage
Collector-emitter breakdown voltage
Emitter-base breakdown voltage
Collector cutoff current
Emitter cutoff current
Collector-emitter saturation voltage
DC current transfer ratio
Transition frequency
Output capacitance
Collector-base time constant
Noise factor
Symbol
BV
CBO
BV
CEO
BV
EBO
I
CBO
I
EBO
V
CE(sat)
h
FE
f
T
Cob
Min.
30
18
3
−
−
−
56
600
−
−
−
Typ.
−
−
−
−
−
−
−
1500
0.9
6
4.5
Max.
−
−
−
0.5
0.5
0.5
180
−
1.5
13
−
Unit
V
V
V
µA
µA
V
−
MHz
pF
ps
dB
I
C
=
10µA
I
C
=
1mA
I
E
=
10µA
V
CB
=
10V
V
EB
=
2V
I
C
/I
B
=
20mA/4mA
V
CE
/I
C
=
10V/10mA
V
CB
=
10V , I
C
=
10mA , f
=
200MHz
V
CB
=
10V , I
E
=
0A , f
=
1MHz
V
CB
=
10V , I
C
=
10mA , f
=
31.8MHz
V
CE
=
12V , I
C
=
2mA , f
=
200MHz , Rg
=
50Ω
Conditions
rbb'·Cc
NF
0.8
(1) Emitter
(2) Base
(3) Collector
0.15
1.1
1/1