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
vz@ I ZT I ZT (Note 1) ∆V ZT
ZZT -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: -65°C to +175°C
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
µ
A @ 25°C & VR= 3 Vdc
ELECTRICAL CHARACTERISTICS @ 25°C, 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 lZT A 60Hz rms a.c. current equal
to 10% of lZT.
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 lZT (mA)
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
+.0010
+.0005
0
-.0005
-.0010
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
5678910
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
500
100
50
10
5
1
ZENER IMPEDANCE ZZT (OHMS)
