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2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
Transistors
High-Frequency Amplifier Transistor
(18V, 50mA, 1.5GHz)
2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
!!!!Features
1) High transition frequency. (Typ. f
2) Small rbb’⋅Cc
and high gain. (Typ. 6ps)
T = 1.5GHz)
3) Small NF.
!!!! Absolute maximum ratings (Ta=25°C)
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
Collector power
dissipation
Junction temperature
Storage temperature
Parameter Symbol
2SC5661, 2SC4725
2SC4082, 2SC3837K
V
V
V
Tstg
CBO
CEO
EBO
I
C
P
C
Tj
!!!!Packaging specifications and hFE
NP
AC
TL
3000
2SC4082
UMT3
NP
∗
1C
T106
3000
∗
Type 2SC4725
Package
h
FE
Marking
Code
Basic ordering unit
(pieces)
∗ Denotes h
2SC5661
VMT3
NP
∗
AC
T2L
8000
FE
EMT3
Limits
30
18
3
50
0.15
0.2
150
−55~+150
2SC3837K
SMT3
NP
AC
T146
3000
!!!!External dimensions (Units : mm)
2SC5661
ROHM : VMT3
Unit
mA
V
V
V
W
°C
°C
2SC4725
ROHM : EMT3
EIAJ : SC-75A
2SC4082
∗
ROHM : UMT3
EIAJ : SC-70
2SC3837K
ROHM : SMT3
EIAJ : SC-59
0.4
0.1Min.
0.3
0.15
0.1to0.4
0.15
0.3to0.6
0.3
0.15
1.2
0.80.2
0.2
(2)
1.2
0.32
(3)
0.5
0.13
(3)
)
3
(
)
3
(
0.8
0.40.4
(1)
0.22
0.15Max.
0to0.1
0.2
(1)
(2)
1.0
0.50.5
0.8
0.2
1.6
0.7
0.55
0to0.1
)
1
(
0.65
)
2
2.0
1.3
(
0.65
1.25
2.1
0.2
0.9
0.7
0to0.1
Each lead has same dimensions
)
1
(
1.9
2.9
)
2
(
0.95 0.95
1.6
2.8
1.1
0.8
Each lead has same dimensions
0to0.1
(1) Base
(2) Emitter
(3) Collector
1.6
(1) Emitter
(2) Base
(3) Collector
(1) Emitter
(2) Base
(3) Collector
(1) Emitter
(2) Base
(3) Collector
!!!!Electrical characteristics (Ta=25°C)
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
Parameter Symbol Min. Typ. Max. Unit Conditions
BV
CBO
BV
CEO
BV
EBO
I
CBO
I
EBO
V
CE(sat)
h
FE
f
T
Cob
rbb'
·Cc
NF
30
−
18
−
3
−
−
−
−
V
−
V
−
µA
0.5
µA
0.5
V
−
−
−−0.5 V IC/I
600
56
1500
0.9
−
MHz
−
pF
1.5
−
180
−
− 613ps
− 4.5 − dB
I
C
I
C
I
E
V
V
V
V
V
V
V
=
=
=
CB
EB
CE/IC
CB
CB
CB
CE
=
=
B
=
=
=
=
10µA
1mA
10µA
=
10V
2V
20mA/4mA
=
10V/10mA
10V , I
C
10V , I
E
10V , I
C
12V , I
C
=
10mA , f
=
0A , f
=
10mA , f
=
2mA , f
=
=
1MHz
=
=
200MHz , Rg
200MHz
31.8MHz
=
50Ω
1/1
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Appendix
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
Notes
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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