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
JEDEC
ZENER
ZENER
MAXIMUM
VOLTAGE
EFFECTIVE
TYPE
VOLTAGE
TEST
ZENER
TEMPERATURE
TEMPERATURE
NUMBER
CURRENT
IMPEDANCE
STABILITY
COEFFICIENT
v
z
@ I
ZT
I
ZT
(Note 1)
V
ZT
Z
ZT
-55 to +100
(Note 2)
VOLTS
mA
OHMS
mV
% / C
1N821
5.9--6.5
7.5
15
96
0.01
1N821A
5.9--6.5
7.5
10
96
0.01
1N822
5.9--6.5
7.5
15
96
0.01
1N823
5.9--6.5
7.5
15
48
0.005
1N823A
5.9--6.5
7.5
10
48
0.005
1N824
5.9--6.5
7.5
15
48
0.005
1N825
5.9--6.5
7.5
15
19
0.002
1N825A
5.9--6.5
7.5
10
19
0.002
1N826
6.2--6.9
7.5
15
20
0.002
1N827
5.9--6.5
7.5
15
9
0.001
1N827A
5.9--6.5
7.5
10
9
0.001
1N828
6.2--6.9
7.5
15
10
0.001
1N829
5.9--6.5
7.5
15
5
0.0005
1N829A
5.9--6.5
7.5
10
5
0.0005
MAXIMUM RATINGS
Operating Temperature: -65C to +175C
Storage Temperature: -65C to +175C
DC Power Dissipation: 500mW @ +50C
Power Derating: 4 mW / C above +50C
REVERSE LEAKAGE CURRENT
l
R
= 2
A @ 25C & V
R
= 3 Vdc
ELECTRICAL CHARACTERISTICS @ 25C, unless otherwise specified.
FIGURE 1
DESIGN DATA
CASE: Hermetically sealed glass
case. DO 35 outline.
LEAD MATERIAL: Copper clad steel.
LEAD FINISH: Tin / Lead
POLARITY: Diode to be operated with
the banded (cathode) end positive.
MOUNTING POSITION: Any.
Double Anode: Electrical Specifications Apply Under Both Bias Polarities.
NOTE 1 Zener impedance is derived by superimposing on l
ZT
A 60Hz rms a.c. current equal
to 10% of l
ZT
.
NOTE 2 The maximum allowable change observed over the entire temperature range i.e.,
the diode voltage will not exceed the specified mV at any discrete temperature
between the established limits, per JEDEC standard No. 5.
1N821-1,1N823-1,1N825-1,1N827-1 AND 1N829-1 AVAILABLE IN
JAN
,
JANTX, JANTXV
AND JANS
PER MIL-PRF-19500/159
TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
METALLURGICALLY BONDED
DOUBLE PLUG CONSTRUCTION
1N821 thru 1N829A
and
1N821-1 thru 1N829-1
1N821
thru
1N829A
INCLUDING -1 VERSIONS
25
50
100
150
175
TL, Lead temperature (C) 3/8" from body
FIGURE 2
POWER DERATING CURVE
600
500
400
300
200
100
0
Pd,
Rated
Power
Dissipation
(mW)
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
OPERATING CURRENT l
ZT
(mA)
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
+.0010
+.0005
0
-.0005
-.0010
CHANGE
IN
TEMPERA
TURE
COEFFICIENT
(
%/C)
5
6
7
8
9
10
OPERATING CURRENT l
ZT
(mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
500
100
50
10
5
1
ZENER
IMPEDANCE
Z
ZT
(OHMS)
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