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WEBSITE: http://www.cdi-diodes.com E-mail: mail@cdi-diodes.com
CDI 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
CDLL821 5.9 - 6.5 7.5 15 96 0.01
CDLL821A 5.9 - 6.5 7.5 10 96 0.01
CDLL822 †5.9 - 6.5 7.5 15 96 0.01
CDLL823 5.9 - 6.5 7.5 15 48 0.005
CDLL823A 5.9 - 6.5 7.5 10 48 0.005
CDLL824 †5.9 - 6.5 7.5 15 48 0.005
CDLL825 5.9 - 6.5 7.5 15 19 0.002
CDLL825A 5.9 - 6.5 7.5 10 19 0.002
CDLL826 6.2 - 6.9 7.5 15 20 0.002
CDLL827 5.9 - 6.5 7.5 15 9 0.001
CDLL827A 5.9 - 6.5 7.5 10 9 0.001
CDLL828 6.2 - 6.9 7.5 15 10 0.001
CDLL829 5.9 - 6.5 7.5 15 5 0.0005
CDLL829A 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.
† 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.
FIGURE 1
DESIGN DATA
CASE: DO-213AA, Hermetically sealed
glass case. (MELF, SOD-80, LL34)
LEAD FINISH: Tin / Lead
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.
• 1N821UR-1, 1N823UR-1, 1N825UR-1, 1N827UR-1 AND 1N829UR-1 AVAILABLE
IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/159
• TEMPERATURE COMPENSATED ZENER DIODES
• LEADLESS PACKAGE FOR SURFACE MOUNT
• 6.2 AND 6.55 VOLT NOMINAL ZENER VOLTAGES
• METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION
1N821UR-1 thru 1N829UR-1
and
CDLL821 thru CDLL829A
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
D 1.60 1.70 0.063 0.067
F 0.41 0.55 0.016 0.022
G 3.30 3.70 .130 .146
G1 2.54 REF. .100 REF.
S 0.03 MIN. .001 MIN.
CDLL821 thru CDLL829A
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
+.0010
+.0005
0
-.0005
-.0010
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5
OPERATING CURRENT lZT (mA)
0 25 50 75 100 125 150 175
TL, Ambient temperature (°C)
FIGURE 2
POWER DERATING CURVE
600
500
400
300
200
100
0
Pd, Rated Power Dissipation (mW)
5678910
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
500
100
50
10
5
1
ZENER IMPEDANCE ZZT (OHMS)
