• 1N3821A-1 THRU 1N3828A-1 AVAILABLE IN JAN, JANTX AND JANTXV
PER MIL-PRF-19500/115
• 1 WATT ZENER DIODE
1N3821A thru 1N3828A
and
1N3821A-1 thru 1N3828A-1
• DOUBLE PLUG CONSTRUCTION
• METALLURGICALLY BONDED
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 1 watt @TL = 95°C
Power Derating: 12.5 mW / °C above TL = 95°C
Forward Voltage @ 200mA = 1.2 volts maximum
ELECTRICAL CHARACTERISTICS @ 25°C
CDI
NOMINAL
ZENER
TYPE
ZENER
TEST
MAX. DC
NUMBER
VOLTAGE
CURRENT
VZ @ 1ZT
(NOTE 3)
1ZT
ZZT @ 1ZT
(NOTE 1)
OHMS
MAXIMUM ZENER IMPEDANCE
ZZK @ 1ZK=1mA
(NOTE 2)
ZENER
MAX. REVERSE
CURRENT
LEAKAGE CURRENT
1ZM
lR @ VR
VOLTS
mA
OHMS
mA
µA
VOLTS
1N3821
1N3821A
1N3822
1N3822A
3.3
3.3
3.6
3.6
76
76
69
69
10
10
10
10
400
400
400
400
276
276
252
252
100
100
75
75
1
1
1
1
1N3823
1N3823A
1N3824
1N3824A
3.9
3.9
4.3
4.3
64
64
58
58
9
9
9
9
400
400
400
400
238
238
213
213
25
25
5
5
1
1
1
1
1N3825
1N3825A
1N3826
1N3826A
4.7
4.7
5.1
5.1
53
53
49
49
8
8
7
7
500
500
550
550
194
194
178
178
5
5
3
3
1
1
1
1
1N3827
1N3827A
1N3828
1N3828A
5.6
5.6
6.2
6.2
45
45
41
41
5
5
2
2
600
600
700
700
162
162
146
146
3
3
3
3
2
2
3
3
FIGURE 1
DESIGN DATA
CASE: Hermetically sealed glass
case, DO41.
LEAD MATERIAL: Copper clad steel
LEAD FINISH: Tin / Lead
THERMAL RESISTANCE: (ROJEC):
80 °C/W maximum at L = .375 inch
THERMAL IMPEDANCE: (ZOJX): 15
°C/W maximum
NOTE 1
No suffix = + 10% tolerance on nominal Zener voltage, suffix “A” signifies +5%, suffix “C”
signifies + 2%, suffix “D” signifies + 1%.
POLARITY: Diode to be operated with
the banded (cathode) end positive.
NOTE 2
Zener impedance is derived by superimposing on 1ZT A 60Hz rms a.c. current equal to
10% of 1ZT.
MOUNTING POSITION: Any.
NOTE 3
Zener voltage is measured with the device junction in thermal equilibrium at an ambient
temperature of 25°C + 3°C.
6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841
PHONE (978) 620-2600
FAX (978) 689-0803
WEBSITE: http://www.microsemi.com
29
1N3821A thru 1N3828A
and
1N3821A-1 thru 1N3828A-1
Pd, Rated Power
Dissipation (mW)
FIGURE 2
1000
800
600
400
200
0
0
25
50
75
100
125
150
175
TL , Lead temperature (°C), 3/8” from body
POWER DERATING CURVE
ZZT, Zener Impedance (OHMS)
1000
100
1N3822A
10
1N3
1N3829A
826
A
1
.1
1.0
10
100
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE VS. OPERATING CURRENT
30
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