TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http://www.microsemi.com
N-CHANNEL J-FET DEPLETION MODE
Equivalent to MIL-PRF-19500/375
T4-LDS-0005 Rev. 2 (101425) Page 1 of 4
DEVICES LEVELS
2N3821 2N3821UB
MQ = JAN Equivalent
2N3822 2N3822UB
MX = JANTX Equivalent
2N3823 2N3823UB
MV = JANTXV Equivalent
ABSOLUTE MAXIMUM RATI NG S (TC = +25°C unless otherwise noted)
Parameters / Test Conditions Symbol 2N3821, U B
2N3822, U B 2N3823, U B
Unit
Gate-Source Voltage VGSR 50 30 V
Drain-Source Voltage VDS 50 30 V
Drain-Gate Voltage VDG 50 30 V
Gate Current IGF 10 mA
Power Dissipation TA = +25°C (1) PT 300 mW
Operating Junction & Storage
Temperature Range Tj, Tstg -55 to + 200 °C
Note: (1) Derate linearly 1.7mW/°C for TA > +25°C.
ELECTRICAL CHARACTERISTICS (TA = +25°C, unless otherwise noted)
Parameters / Test Conditions
Symbol Min. Max. Unit
OFF CHARACTERTICS
Gate-Source Breakdown Voltage
VDS = 0, IG = 1.0μA dc
2N3821 / UB
2N3822 / UB
2N3823 / UB V(BR)GSSR 50
50
30
Vdc
Gate Reverse Current
VDS = 0, VGS = 30V dc
VDS = 0, VGS = 30V dc
VDS = 0, VGS = 20V dc
2N3821 / UB
2N3822 / UB
2N3823 / UB
IGSSR
0.1
0.1
0.5
ηA
Zero-Gate-Voltage Drain Current
VGS = 0, VDS = 15V dc
2N3821 / UB
2N3822 / UB
2N3823 / UB IDSS
0.5
2.0
4.0
2.5
10
20
mA
Gate-Source Voltage
VDS = 15V dc, ID = 50μA dc
VDS = 15V dc, ID = 200μA dc
VDS = 15V dc, ID = 400μA dc
2N3821 / UB
2N3822 / UB
2N3823 / UB
VGS
0.5
1.0
1.0
2.0
4.0
7.5
Vdc
Gate-Source Cutoff Voltage
VDS = 15V dc, ID = 0.5ηA dc
2N3821 / UB
2N3822 / UB
2N3823 / UB
VGS(off)
4.0
6.0
8.0
Vdc
TO-72 (TO-206AF)
UB - Package
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http://www.microsemi.com
T4-LDS-0005 Rev. 2 (101425) Page 2 of 4
DYNAMIC CHARACTERISTICS
Parameters / Test Conditions Symbol Min. Max. Unit
Small-Signal Common Source, Short-Circuit Forward Transfer Admittance
VGS = 0, VDS = 15V dc, f = 1.0kHz 2N3821 / UB
2N3822 / UB
2N3823 / UB
|yfs|1 1500
3000
3500
4500
6500
6500
μS
Small-Signal, Common Source, Short-Circuit Output Admittance
VGS = 0, VDS = 15V dc, f = 1.0kHz 2N3821 / UB
2N3822 / UB
2N3823 / UB
|yos|
10
20
35
μS
Small-Signal, Common-Source Short-Circuit Input Capacitance
VGS = 0V dc, VDS = 15V dc, 100kHz f 1.0MHz
Ciss 6.0 pF
Small-Signal, Common-Source Reverse Transfer Capacitance
VDS = 15V dc, VGS = 0, 100kHz f 1.0MHz 2N3821 / UB
2N3822 / UB
2N3823 / UB
Crss
3.0
3.0
2.0
pF
Small-Signal, Common-Source, Short-Circuit Forward Transfer Admittance
VGS = 0, VDS = 15V dc, f = 100MHz
f = 100MHz
f = 200MHz
2N3821 / UB
2N3822 / UB
2N3823 / UB
|yfs|3 1500
3000
3200
μS
Small-Signal, Common-Source Short-Circuit Input Conductance
VGS = 0, VDS = 15V dc, f = 200MHz 2N3823 (only) gis 800 μS
Small-Signal, Common-Source Short-Circuit Output Conductance
VGS = 0, VDS = 15V dc, f = 200MHz 2N3823 (only) gos 200 μS
Common Source Spot Noise Figure
VGS = 0, VDS = 15V dc, RG = 1MΩ
f = 10Hz
f = 1.0kHz
2N382, 2N3822 / UB
2N3821, 2N3822, 2N3823 / UB
NF1
5.0
2.0
dB
Common Source Spot Noise Figure
VGS = 0, VDS = 15V dc, RG = 1kΩ
f = 105MHz
2N3823 / UB (only) NF2 2.5 dB
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http://www.microsemi.com
T4-LDS-0005 Rev. 2 (101425) Page 3 of 4
PACKAGE DIMENSIONS
NOTE:
* 1 Dimensions are in inches. Millimeters are given for general information only.
2 Measured in the zone beyond .250 (6.35 mm) from the seating plane.
3 Measured in the zone .050 (1.27 mm) and .250 (6.35 mm) from the seating plane.
4 When measured in a gauging plane .054 +.001, -.000 (1.37 +.3, -.00 mm) before the seating plane of the transistor,
maximum diameter leads shall be within .007 (.18 mm) of their true location relative to a maximum width tab. Smaller
diameter leads shall fall within the outline of the maximum diameter lead tolerance.
5 The active elements are electrically insulated from the case.
6 All 4 leads.
7 Lead 1 is the source, lead 2 is the drain, lead 3 is the gate, and lead 4 is the case.
8 Symbol TL is measured from HD maximum.
9 In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
*FIGURE 1 Physical dimensions (similar to TO-72)
Dimensions
Ltr Inches Millimeters Notes
Min Max Min Max
CD .178 .195 4.52 4.95
CH .170 .210 4.32 5.33
HD .209 .230 5.31 5.84
L1 .050 1.27
L2 .250 6.35
LC .100 TP 2.54 TP
LD .016 .021 0.41 0.53 2, 6
LL .500 .750 12.70 19.05 6
LU .016 .019 0.41 0.48 3, 6
Q .040 1.02
r .007 0.18
TL .028 .048 0.71 1.22 8
TW .036 .046 0.91 1.17
α 45° TP
TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: ( 978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http://www.microsemi.com
T4-LDS-0005 Rev. 2 (101425) Page 4 of 4
NOTES:
1. Dimensions are in inches.
* 2. Millimeters are given for general information only.
* 3. Hatched areas on package denote metallized areas.
* 4. Lid material: Kovar.
* 5. Pad 1 = Drain, Pad 2 = Source, Pad 3 = Gate, Pad 4 = Shielding
connected to the lid.
* FIGURE 2. Physical dimensions, surface mount (2N3821UB, 2N3822UB, AND 2N3823UB).
Dimensions
Symbol Inches Millimeters Note
Min Max Min Max
BH .046 .056 1.17 1.42
BL .115 .128 2.92 3.25
BW .085 .108 2.16 2.74
CL .128 3.25
CW .108 2.74
LL1 .022 .038 0.56 0.96
LL2 .017 .035 0.43 0.89
LS1 .036 .040 0.91 1.02
LS2 .071 .079 1.81 2.01
LW .016 .024 0.41 0.61
r .008 .203
r1 .012 .305
r2 .022 .559