• 1N3821A-1 THRU 1N3828A-1 AVAILABLE IN JAN, JANTX AND JANTXV
PER MIL-PRF-19500/115
• 1 WATT ZENER DIODE
• DOUBLE PLUG CONSTRUCTION
• METALLURGICALLY BONDED
1N3821A thru 1N3828A
and
1N3821A-1 thru 1N3828A-1
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
TYPE
NUMBER
(NOTE 1)
NOMINAL
ZENER
VOLTAGE
VZ @ 1ZT
(NOTE 3)
VOLTS
1N3821
1N3821A
1N3822
1N3822A
1N3823
1N3823A
1N3824
1N3824A
1N3825
1N3825A
1N3826
1N3826A
1N3827
1N3827A
1N3828
1N3828A
3.3
3.3
3.6
3.6
3.9
3.9
4.3
4.3
4.7
4.7
5.1
5.1
5.6
5.6
6.2
6.2
ZENER
TEST
CURRENT
1ZT
ZZT @ 1ZT
ZZK @ 1ZK=1mA
(NOTE 2)
OHMS
400
400
400
400
400
400
400
400
500
500
550
550
600
600
700
700
MAXIMUM ZENER IMPEDANCE
MAX. DC
ZENER
CURRENT
1ZM
MAX. REVERSE
LEAKAGE CURRENT
lR @ VR
mA
76
76
69
69
64
64
58
58
53
53
49
49
45
45
41
41
OHMS
10
10
10
10
9
9
9
9
8
8
7
7
5
5
2
2
mA
276
276
252
252
238
238
213
213
194
194
178
178
162
162
146
146
µ
A
100
100
75
75
25
25
5
5
5
5
3
3
3
3
3
3
VOLTS
1
1
1
1
1
1
1
1
1
1
1
1
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: (R
OJEC):
80 ˚C/W maximum at L = .375 inch
THERMAL IMPEDANCE: (Z
OJX): 15
˚C/W maximum
NOTE 1
NOTE 2
NOTE 3
No suffix = + 10% tolerance on nominal Zener voltage, suffix “A” signifies +5%, suffix “C”
signifies + 2%, suffix “D” signifies + 1%.
Zener impedance is derived by superimposing on 1ZT A 60Hz rms a.c. current equal to
10% of 1ZT.
Zener voltage is measured with the device junction in thermal equilibrium at an ambient
temperature of 25°C + 3°C.
POLARITY:
Diode to be operated with
the banded (cathode) end positive.
MOUNTING POSITION:
Any.
22 COREY STREET, MELROSE, MASSACHUSETTS 02176
PHONE (781) 665-1071
FAX (781) 665-7379
WEBSITE: http://www.cdi-diodes.com
E-mail: mail@cdi-diodes.com
1N3821A thru 1N3828A
and
1N3821A-1 thru 1N3828A-1
FIGURE 2
1000
800
600
400
200
0
0
25
50
75
100
125
150
175
Pd, Rated Power
Dissipation (mW)
TL , Lead temperature (°C)
,
3/8” from body
POWER DERATING CURVE
1000
ZZT, Zener Impedance (OHMS)
100
1N3822A
10
1N3829A
1N3
826
A
1
.1
1.0
10
100
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE VS. OPERATING CURRENT
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