Transistors
2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
High-Frequency Amplifier Transistor
(20V, 50mA, 1.5GHz)
2SC5661 / 2SC4725 / 2SC4082 / 2SC3837K
zFeatures
1) High transition frequency. (Typ. fT = 1.5GHz)
2) Small rbb’⋅Cc and high gain. (Typ. 6ps)
3) Small NF.
zPackaging specifications and hFE
Type
Package
hFE
Marking
Code
Basic ordering unit
(pieces)
2SC5661
VMT3
NP
AC∗
T2L
8000
2SC4725
EMT3
NP
AC∗
TL
3000
2SC4082
UMT3
NP
1C∗
T106
3000
∗ Denotes hFE
2SC3837K
SMT3
NP
AC∗
T146
3000
z Absolute maximum ratings (Ta=25°C)
Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
Collector power
dissipation
2SC5661, 2SC4725
2SC4082, 2SC3837K
Junction temperature
Storage temperature
Symbol
Limits
Unit
VCBO
30
V
VCEO
20
V
VEBO
3
V
IC
50
mA
0.15
PC
W
0.2
Tj
150
°C
Tstg
−55 to +150
°C
zExternal dimensions (Unit : mm)
2SC5661
1.2
0.2 0.8 0.2
(2)
(3)
(1)
ROHM : VMT3
2SC4725
ROHM : EMT3
EIAJ : SC-75A
2SC4082
0.15Max.
(1)
(3)
(2)
0.8
1.6
0.1Min.
(1) Base
(2) Emitter
(3) Collector
(1) Emitter
(2) Base
(3) Collector
ROHM : UMT3
EIAJ : SC-70
2SC3837K
1.25
2.1
0.1to0.4
(1) Emitter
(2) Base
(3) Collector
Each lead has same dimensions
ROHM : SMT3
EIAJ : SC-59
1.6
2.8
(1) Emitter
(2) Base
(3) Collector
0.3to0.6
Each lead has same dimensions
zElectrical characteristics (Ta=25°C)
Parameter
Symbol
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
BVCBO
BVCEO
BVEBO
ICBO
IEBO
VCE(sat)
hFE
fT
Cob
rbb'·Cc
NF
Min.
Typ.
Max.
Unit
Conditions
30
−
−
V
IC = 10µA
18
−
−
V
IC = 1mA
3
−
−
V
IE = 10µA
−
−
0.5
µA VCB = 15V
−
−
0.5
µA VEB = 2V
−
−
0.5
V
IC/IB = 20mA/4mA
56
−
180
−
VCE/IC = 10V/10mA
600
1500
−
MHz VCE = 10V , IE = −10mA , f = 200MHz
−
0.9
1.5
pF VCB = 10V , IE = 0A , f = 1MHz
−
6
13
ps VCB = 10V , IC = 10mA , f = 31.8MHz
−
4.5
−
dB VCE = 12V , IC = 2mA , f = 200MHz , Rg = 50Ω
Rev.A
1/3