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
FIGURE 1
DESIGN DATA
CASE: DO-213AB, Hermetically sealed
glass case. (MELF, LL41)
LEAD FINISH: Tin / Lead
THERMAL RESISTANCE: (ROJEC): 50
C/W maximum at L = 0 inch
THERMAL IMPEDANCE: (ZOJX): 15
C/W maximum
POLARITY: Diode to be operated with the
banded (cathode) end positive.
MOUNTING POSITION: Any.
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.
MILLIMETERS INCHES
DIM
MIN
MAX
MIN
MAX
D
2.39
2.66
.094
.105
F
0.41
0.55
.016
.022
G
4.80
5.20
.189
.205
G1
4.11 REF.
.159 REF.
S
0.03 MIN.
.001 MIN.
ELECTRICAL CHARACTERISTICS @ 25C
CDI
NOMINAL
ZENER
MAX. DC
TYPE
ZENER
TEST
MAXIMUM ZENER IMPEDANCE
ZENER
MAX. REVERSE
NUMBER
VOLTAGE
CURRENT
CURRENT LEAKAGE CURRENT
VZ @ 1ZT
1ZT
ZZT @ 1ZT
ZZK @ 1ZK=1mA
1ZM
lR @ VR
(NOTE 1)
(NOTE 3)
(NOTE 2)
VOLTS
mA
OHMS
OHMS
mA
A
VOLTS
CDLL3821
3.3
76
10
400
276
100
1
CDLL3821A
3.3
76
10
400
276
100
1
CDLL3822
3.6
69
10
400
252
75
1
CDLL3822A
3.6
69
10
400
252
75
1
CDLL3823
3.9
64
9
400
238
25
1
CDLL3823A
3.9
64
9
400
238
25
1
CDLL3824
4.3
58
9
400
213
5
1
CDLL3824A
4.3
58
9
400
213
5
1
CDLL3825
4.7
53
8
500
194
5
1
CDLL3825A
4.7
53
8
500
194
5
1
CDLL3826
5.1
49
7
550
178
3
1
CDLL3826A
5.1
49
7
550
178
3
1
CDLL3827
5.6
45
5
600
162
3
2
CDLL3827A
5.6
45
5
600
162
3
2
CDLL3828
6.2
41
2
700
146
3
3
CDLL3828A
6.2
41
2
700
146
3
3
MAXIMUM RATINGS
Operating Temperature: -65C to +175C
Storage Temperature: -65C to +175C
DC Power Dissipation: 1 watt @ +TEC = 125C
Power Derating: 20 mW / C above TEC = 125C
Forward Voltage @ 200mA = 1.2 volts maximum
NOTE 1
No suffix = + 10% tolerance on nominal Zener voltage, suffix "A" signifies +5%, "C" suffix
signifies + 2% and "D" suffix signifies + 1%.
NOTE 2
Zener impedance is derived by superimposing on 1ZT A 60Hz rms a.c. current equal to
10% of 1ZT.
NOTE 3
Zener voltage is measured with the device junction in thermal equilibrium at an ambient
temperature of 25C + 3C.
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
1N3821AUR-1 thru 1N3828AUR-1
and
CDLL3821A thru CDLL3828A
1000
100
10
1
Z
ZT
,
Zener
Impedance
(OHMS)
.1
1.0
10
100
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
0
25
50
75
100
125
150
175
TEC , End cap temperature (C)
POWER DERATING CURVE
1000
800
600
400
200
0
Pd,
Rated
Power
Dissipation
(mW)
FIGURE 2
PDF 
ZIP