2N4856 | 2N4857 | 2N4858
N-CHANNEL JFETS - 1
KEY FEATURES
JAN/JANTX/JANTXV STANDARD PRODUCTS
QUALIFIED PER MIL-PRF-19500/385
LOW ON RESISTANCE
FAST SWITCHING
HIGH OFF ISOLATION
S LEVEL EQUIVALENT SCREENING OPTIONS
RADIATION TOLERANT
SECOND SOURCE FOR VISHAY & SILICONIX
Part Number Package 19500/ Breakdown Voltage Current R
DS(on)
2N4856 TO-18 385 40V 175mA 25
2N4857 TO-18 385 40V 100mA 40
2N4858 TO-18 385 40V 80mA 60
ABSOLUTE MAXIMUM RATINGS
Gate-Source Voltage -40V Storage Temperature -65 to 200C
Gate Current 50mA Operating Junction Temperature -65 to 200C
Lead Temperature Power Dissipation 1800mW
300C
(1/16 from case, 10 sec) Derating 10.3mW/C to TC 25C
ORDERING GUIDE
JAN2N4856 JANTX2N4856 JANTXV2N4856
JAN2N4857 JANTX2N4857 JANTXV2N4857
JAN2N4858 JANTX2N4858 JANTXV2N4858
PACKAGE OUTLINE & PIN CONNECTIONS
CD
Dimensions
P Ltr Inches mm
CH
G and Case
Min. Max. Min. Max.
Q
CD 0.178 0.195 4.52 4.95
3
CH 0.170 0.210 4.32 5.33
L1
LU
HD 0.209 0.230 5.31 5.84
SEATING
LL
2.54 TP
L2 LC 0.100 TP
PLATE
LD 0.016 0.021 0.41 0.53
LL 0.500 0.750 2.70 19.05
LU 0.016 0.019 0.41 0.48
LD
L1 0.050 1.27
2
1 L2 0.250 6.35
HD
P 0.100 2.54
Q 0.030 0.76
1 2
S D TL 0.028 0.048 0.71 1.22
TW 0.036 0.046 0.91 1.17
C
L
r 0.010 0.25
45 TP
TW
3
r
TL
LC
CALL: +1 561-848-4311 www.solitrondevices.com EMAIL: sales@solitrondevices.com2N4856 | 2N4857 | 2N4858
N-CHANNEL JFETS - 2
ELECTRICAL SPECIFICATIONS
Typical @ 25C unless otherwise noted
Parameter Symbol Min. Max. Unit
Gate-Source Breakdown Voltage
V -40 Vdc
(BR)GSS
V =0Vdc, I = 1.0Adc
DS G
Gate-Source Off State Voltage
V = 15Vdc, I = 0.5nAdc 2N4856 -4 -10 Vdc
DS D
V
GS(on)
2N4857 -2 -6 Vdc
2N4858 -0.8 -4 Vdc
Gate Reverse Current
V = 0Vdc, V = -20Vdc I -0.25 nA
DS GS GSS
V = 0Vdc, V = -15Vdc -0.25 nA
DS GS
Drain Current
V = 15Vdc, V = -10Vdc 0.25 nA
DS GS
V = 15Vdc, V = 0Vdc 2N4856 I 50 175 mA
DS GS D(off)
2N4857 20 100 mA
2N4858 8 80 mA
Static Drain - Source On State Resistance
V = 0Vdc, I = 1mAdc 2N4856 25
GS D
R
DS(on)
2N4857 40
2N4858 60
Drain Source On State Voltage
V = 0Vdc, I = 20mAdc 2N4856 0.75 Vdc
GS D
V
DS(on)
V = 0Vdc, I = 10mAdc 2N4857 0.5 Vdc
GS D
V = 0Vdc, I = 5mAdc 2N4858 0.5 Vdc
GS D
Small Signal, Common Source Reverse Transfer Capacitance
V = -10Vdc V , V = 0Vdc, f = 1.0MHz C 8 pF
GS DS D rss
C = 0.1F, L1 =L2 500H
1
Small Signal, Common Source Short-Circuit Input Capacitance
V = -10Vdc V , VD = 0Vdc, f = 1.0MHz
GS DS
C 8 pF
iss
C = 0.1F, C2 = 20.1m
1
F = L 500H
L1 2
Turn On Delay Time
2N4856 6 nS
t
D(on)
2N4857 6 nS
2N4858 10 nS
Rise Time
2N4856 3 nS
t
r
2N4857 4 nS
2N4858 10 nS
Turn Off Delay Time
2N4856 25 nS
t
d(off)
2N4857 50 nS
2N4858 100 nS
2019 Solitron Devices, Inc.
This document is believed to be correct at the time of publication and Solitron Devices accepts no responsibility for consequences from printing errors or inaccuracies. All specifications are subject to change without notice.
Solitron Devices, Inc. 3301 Electronics Way, West Palm Beach, Florida 33407, USA +1 561-848-4311 sales@solitrondevices.com
2n4856_8-ds-revC-0319.indd