• 1N3821AUR-1 thru 1N3828AUR-1 AVAILABLE IN
JAN, JANTX AND JANTXV
PER MIL-PRF-19500/115
• LEADLESS PACKAGE FOR SURFACE MOUNT
• DOUBLE PLUG CONSTRUCTION
• METALLURGICALLY BONDED
1N3821AUR-1
thru
1N3828AUR-1
and
CDLL3821 thru CDLL 3828A
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 1 watt @ +TEC = 125°C
Power Derating: 20 mW / °C above TEC = 125°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
CDLL3821
CDLL3821A
CDLL3822
CDLL3822A
CDLL3823
CDLL3823A
CDLL3824
CDLL3824A
CDLL3825
CDLL3825A
CDLL3826
CDLL3826A
CDLL3827
CDLL3827A
CDLL3828
CDLL3828A
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
DIM
D
F
G
G1
S
MILLIMETERS
MIN MAX
2.39
2.66
0.41
0.55
4.80
5.20
4.11 REF.
0.03 MIN.
INCHES
MIN MAX
.094 .105
.016 .022
.189 .205
.159 REF.
.001 MIN.
FIGURE 1
DESIGN DATA
CASE:
DO-213AB, Hermetically sealed
glass case. (MELF, LL41)
LEAD FINISH:
Tin / Lead
THERMAL RESISTANCE: (R
OJEC): 50
˚C/W maximum at L = 0 inch
THERMAL IMPEDANCE: (ZO
JX): 15
˚C/W maximum
POLARITY:
Diode to be operated with the
banded (cathode) end positive.
MOUNTING POSITION:
Any.
NOTE 1
NOTE 2
NOTE 3
No suffix = + 10% tolerance on nominal Zener voltage, suffix “A” signifies +5%, "C" suffix
signifies + 2% and "D" suffix 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.
MOUNTING SURFACE SELECTION:
The Axial Coefficient of Expansion (COE)
Of this Device is Approximately
+6PPM/°C. The COE of the Mounting
Surface System Should Be Selected To
Provide A Suitable Match With This
Device.
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
1N3821AUR-1 thru 1N3828AUR-1
and
CDLL3821A thru CDLL3828A
FIGURE 2
1000
800
600
400
200
0
0
25
50
75
100
125
150
175
Pd, Rated Power
Dissipation (mW)
TEC , End cap temperature (°C)
POWER DERATING CURVE
1000
ZZT, Zener Impedance (OHMS)
100
10
1
.1
1.0
10
OPERATING CURRENT lZT (mA)
100
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
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