
Silicon Junction FETs (Small Signal)
2SK1860
Silicon N-Channel Junction FET
1
Publication date: August 2003
SJF00039AED
For impedance conversion in low frequency
For electret capacitor microphone
■
 Features
 High mutual conductance g
m
 Low noise voltage of  NV
■
 Absolute Maximum Ratings  
T
a
=
 25
°
C
1: Drain
2: Source
3: Gate
Minit3-F1 Package
Unit: mm
–0.05
0.40
–0.01
0.12
2
±
0
1
±
0
2
±
0
0
±
0
5
±
0
2.9
±
0.2
1.9
±
0.1
(0.95)
(0.5)
(0.95)
2
3
1
10
5
■
 Electrical Characteristics  
T
a
=
 25
°
C 
±
 3
°
C
Note) 1. Measuring methods are based on JAPANESE INDUSTRIAL STANDARD JIS C 7030 measuring methods for transistors.
2.* :
 
G
v ·
f
 
is assured for AQL0.065
%. 
(the measurment method is used by source-grounded circuit.)
Parameter
Symbol
Rating
Unit
Drain-source voltage (Gate open)
V
DSO
20
20
V
Drain-gate voltage (Souse open)
V
DGO
I
DSO
V
Drain-source current (Gate open)
2
mA
Drain-gate current (Souse open)
I
DGO
2
mA
Gate-source cutoff current (Drain open)
I
GSO
P
D
2
mA
Power dissipation
200
mW
Operating ambient temperature
T
opr
20
to
+
80
55
to
+
150
°
C
°
C
Storage temperature
T
stg
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Drain current
I
D
I
DSS
V
DS
=
4.5
 V, C
O
=
 10 pF R
D
=
 2.2 k
±
 1%
V
DS
=
 4.5 V, V
GS
=
 0
100
600
μ
A
μ
A
Drain-sourse cutoff current
(G-S short)
95
480
Mutual conductance
g
m
NV
V
D
 = 4.5 V, V
GS
 = 0  f = 1 kHz
V
D
=
 4.5 V,  R
D
=
 2.2 k
±
 1%
C
O
=
 10 pF, A-curve
V
D
=
 4.5 V,  R
D
=
 2.2 k
±
 1%
C
O
=
 10 pF, e
G
=
 10 mV  f 
=
 1 kHz
V
D
=
 12 V,  R
D
=
 2.2 k
±
 1%
C
O
=
 10 pF, e
G
=
 10 mV  f 
=
 1 kHz
V
D
=
 1.5 V,  R
D
=
 2.2 k
±
 1%
C
O
=
 10 pF, e
G
=
 10 mV  f 
=
 1 kHz
V
D
=
 4.5 V,  R
D
=
 2.2 k
±
 1%
C
O
=
 10 pF, e
G
=
 10 mV  f 
=
 1 kHz to 70 Hz
700
1
600
μ
S
μ
V
Noise voltage
4
Voltage gain
G
v1
3
2
dB
G
v2
0
3.3
dB
G
v3
4.5
 0.3
dB
G
v ·
f
*
0
1.5
dB
Voltage gain difference
G
v2 
 G
v1
G
v1 
G
v3
0
3.5
dB
0
3.5
dB
Marking Symbol: 1H