2N4857
2N4857A
N-CHANNEL
SILICON JFET
DESCRIPTION:
The CENTRAL SEMICONDUCTOR 2N4857 and
2N4857A are N-Channel silicon JFETs designed for
analog switching and chopper applications.
MARKING: FULL PART NUMBER
MAXIMUM RATINGS: (TA=25°C) SYMBOL UNITS
Drain-Source Voltage VDS 40 V
Drain-Gate Voltage VDG 40 V
Reverse Gate-Source Voltage VGSR 40 V
Forward Gate Current IGF 50 mA
Power Dissipation (TA=25°C) PD 360 mW
Operating and Storage Junction Temperature TJ, Tstg -65 to +200 °C
ELECTRICAL CHARACTERISTICS: (TA=25°C unless otherwise noted)
SYMBOL TEST CONDITIONS MIN MAX UNITS
IGSS V
GS=20V, VDS=0 0.25 nA
IGSS V
GS=20V, VDS=0, TA=150°C 0.5 μA
IDSS V
DS=15V, VGS=0 20 100 mA
ID(OFF) V
DS=15V, VGS=10V 0.25 nA
ID(OFF) V
DS=15V, VGS=10V, TA=150°C 0.5 μA
BVGSS I
G=1.0μA, VDS=0 40 V
VGS(OFF) V
DS=15V, ID=0.5nA 2.0 6.0 V
VDS(ON) I
D=10mA, VGS=0 0.5 V
rDS(ON) V
GS=0, ID=0, f=1.0kHz 40 Ω
Crss V
GS=10V, VDS=0, f=1.0MHz (2N4857) 8.0 pF
Crss V
GS=10V, VDS=0, f=1.0MHz (2N4857A) 3.5 pF
Ciss V
GS=10V, VDS=0, f=1.0MHz (2N4857) 18 pF
Ciss V
GS=10V, VDS=0, f=1.0MHz (2N4857A) 10 pF
td V
DD=10V, VGS(OFF)=6.0V, ID=10mA 6.0 ns
tr V
DD=10V, VGS(OFF)=6.0V, ID=10mA 4.0 ns
toff V
DD=10V, VGS(OFF)=6.0V, ID=10mA (2N4857) 50 ns
toff V
DD=10V, VGS(OFF)=6.0V, ID=10mA (2N4857A) 40 ns
TO-18 CASE
R0 (11-June 2012)
www.centralsemi.com
2N4857
2N4857A
N-CHANNEL
SILICON JFET
TO-18 CASE - MECHANICAL OUTLINE
LEAD CODE:
1) Source
2) Drain
3) Gate
MARKING: FULL PART NUMBER
www.centralsemi.com
R0 (11-June 2012)
