TECHNICAL DATA
N-CHANNEL J-FET
Qualified per MIL-PRF-19500/385
Devices
Qualified
Level
JAN
JANTX
JANTXV
2N4856
2N4857
2N4858
2N4859
2N4860
2N4861
2N4856UB 2N4857UB 2N4858UB 2N4859UB 2N4860UB 2N4861UB
ABSOLUTE MAXIMUM RATINGS (T
C
= +25
0
C unless otherwise noted)
2N4856 2N4859
Parameters / Test Conditions
Symbol 2N4857 2N4860
2N4858 2N4861
Gate-Source Voltage
V
GS
-40
-30
Drain-Source Voltage
V
DS
40
30
Drain-Gate Voltage
V
DG
40
30
Gate Current
I
G
50
Power Dissipation
T
A
= +25
0
C
(1)
P
T
0.36
0 (2)
T
C
= +25 C
1.8
Operating Junction & Storage Temperature Range
T
j
, T
stg
-65 to +200
0
0
(1) Derate linearly 2.06 mW/ C for T
A
> 25 C.
(2) Derate linearly 10.3 mW/
0
C for T
C
> 25
0
C.
Unit
V
V
V
mA
W
W
0
C
TO-18*
(TO-206AA)
Surface Mount
(UB version)
*See appendix A
for package
outline
ELECTRICAL CHARACTERISTICS (T
C
= 25
0
C unless otherwise noted)
Parameters / Test Conditions
Symbol
Gate-Source Breakdown Voltage
V
DS
= 0, I
G
= 1.0
µAdc
2N4856, 2N4857, 2N4858
V
(BR)GSS
2N4859, 2N4860, 2N4861
Min.
-40
-30
-4.0
-2.0
-0.8
Max.
Units
Vdc
Gate-Source “Off” State Voltage
V
DS
= 15 Vdc, I
D
= 0.5
ηAdc
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
2N4856, 2N4857, 2N4858
2N4859, 2N4860, 2N4861
V
GS(on)
-10
-6.0
-4.0
-0.25
-0.25
0.25
Vdc
Gate Reverse Current
V
DS
= 0, V
GS
= -20 Vdc
V
DS
= 0, V
GS
= -15 Vdc
Drain Current
V
GS
= -10 Vds, V
DS
= 15 Vdc
I
GSS
I
D(off)
ηA
ηA
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 794-1666 / Fax: (978) 689-0803
022802
Page 1 of 2
2N4856, 2N4857, 2N4858, 2N4859, 2N4860, 2N24861 JAN SERIES
ELECTRICAL CHARACTERISTICS (T
C
= 25
0
C unless otherwise noted) (con’t)
Parameters / Test Conditions
Symbol
Drain Current
V
GS
= 0, V
DS
= 15 Vdc
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
I
DSS
Min.
50
20
8.0
Max.
175
100
80
Units
mA
Static Drain - Source “On” State Resistance
V
GS
= 0, I
D
= 1.0 mAdc
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
r
ds(on)
25
40
60
0.75
0.50
0.50
8.0
Ω
Drain-Source “On” State Voltage
V
GS
= 0, I
D
= 20 mAdc
2N4856, 2N4859
V
GS
= 0, I
D
= 10 mAdc
2N4857, 2N4860
V
GS
= 0, I
D
= 5.0 mAdc
2N4858, 2N4861
Small-Signal, Common-Source Reverse Transfer Capacitance
V
GS
= -10 Vdc, V
DS
= 0, f = 1.0 MHz
C
1
= 0.1µF, L
1
= L
2
≥
500
µH
V
DS(on)
Vdc
C
rss
pF
Small-Signal, Common-Source Short-Circuit Input Capacitance
V
GS
= -10 Vdc, V
DS
= 0, f = 1.0 MHz
C
1
= 0.1µF, C
2
= 20.1 m
FL
1
= L
2
≥
500
µH
Turn-On Delay Time
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
Rise Time
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
Turn-Off Delay Time
2N4856, 2N4859
2N4857, 2N4860
2N4858, 2N4861
C
iss
18
pF
t
d
on
See Figure 3
of MIL-PRF-
19500/385
t
t
r
d
off
6
6
10
3
4
10
25
50
100
ηs
ηs
ηs
6 Lake Street, Lawrence, MA 01841
1-800-446-1158 / (978) 794-1666 / Fax: (978) 689-0803
022802
Page 2 of 2
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