Temperature Compensated
Zener Reference Diode Series
1N821A thru 1N829A & 1N821-1 thru 1N829-1
Features
•
•
1N821-1, 1N823-1, 1N825-1, 1N827-1 and 1N829-1 available
in JAN, JANTX, JANTXV, JANS
Metallurgically Bonded, Double Plug Construction
Maximum Ratings
Operating & Storage Temperature: -65°C to +175°C
DC Power Dissipation: 500mW @ +50°C
Power Derating: 4 mW / °C above +50°C
REVERSE LEAKAGE CURRENT
lR = 2 μA @ 25°C & VR = 3 Vdc
Electrical Specifications @ +25 ºC (Unless Otherwise Specified)
JEDEC
TYPE
Number
(Note1)
1N821
1N821A
1N823
1N823A
1N825
1N825A
1N826
1N827
1N827A
1N828
1N829
1N829A
Normal
Zener
Voltage
Vz @ IZT
Volts
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
6.2—6.9
5.9—6.5
5.9—6.5
6.2—6.9
5.9—6.5
5.9—6.5
Zener
Test
Current
IZT
mA
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
Maximum Zener
Impedance
(Note 1)
ZZT
Ohms
15
10
15
10
15
10
15
15
10
15
15
10
Voltage Temperature
Stability
Δ
V
ZT
-55° to +100°C
(Note 2)
mV
96
96
48
48
19
19
20
9
9
10
5
5
%/°C
0.01
0.01
0.005
0.005
0.002
0.002
0.002
0.001
0.001
0.001
0.0005
0.0005
Effective
Temperature
Coefficient
NOTE 1:
NOTE 2:
Zener impedance is derived by superimposing on lZT A 60Hz rms a.c. current equal to 10% of lZT.
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.
Outline Drawing
LEADED DESIGN DATA
0.080 MAX
2.03 DIA
1.000
MIN
25.400
CASE: Hermetically sealed, DO – 35
LEAD MATERIAL: Copper clad steel
LEAD FINISH: Tin / Lead
POLARITY: Cathode end is banded.
MOUNTING POSITION: Any
POLARITY
BAND
(CATHODE)
0.175
MAX
4.44
0.018 / 0.022
DIA
0.457 / 0.559
1.000
MIN
25.400
All dimensions in INCH
mm
Revision Date: 11/6/2014
1
1N821A thru 1N829A and 1N821-1 thru 1N829A-1
Graphs
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
500
+.0010
+.0005
0
-.0005
-.0010
Pd, Rated Power
Dissipation (mW)
600
500
400
300
200
100
0
25
50
100
150
175
ZENER IMPEDANCE ZZT (OHMS)
100
50
10
5
TL, Lead temperature (C°) 3/8” from body
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
POWER DERATING CURVE
1
5
6
7
8
9
10
OPERATING CURRENT lZT (mA)
OPERATING CURRENT lZT (mA)
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
ZENER IMPEDANCE
VS.
OPERATING CURRENT
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Aeroflex / Metelics, Inc. reserves the right to make changes to any products and services
herein at any time without notice. Consult Aeroflex or an authorized sales representative to
verify that the information in this data sheet is current before using this product. Aeroflex
does not assume any responsibility or liability arising out of the application or use of any
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Revision Date: 11/6/2014
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