• 1N941BUR-1, 1N943UR-1B, 1N944BUR-1 AND 1N945BUR-1 AVAILABLE IN
JAN, JANTX, JANTXV AND JANS
PER MIL-PRF-19500/157
• TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
• LEADLESS PACKAGE FOR SURFACE MOUNT
• 11.7 VOLT NOMINAL ZENER VOLTAGE
• METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION
1N941BUR-1 thru1N945BUR-1
and
CDLL941 thru CDLL945B
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
l
R
= 15
µ
A @ 25°C & V
R
= 8 Vdc
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.
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
CDI
TYPE
NUMBER
ZENER
VOLTAGE
VZ @ I ZT
ZENER
TEST
CURRENT
I ZT
MAXIMUM
VOLTAGE
TEMPERATURE
ZENER
TEMPERATURE
RANGE
IMPEDANCE
STABILITY
ZZT
V ZT
MAXIMUM
(Note 1)
(Note 2)
mV
88
181
239
44
90
120
18
36
47
9
18
24
4
9
12
°C
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
EFFECTIVE
TEMPERATURE
COEFFICIENT
FIGURE 1
% / °C
0.01
0.01
0.01
0.005
0.005
0.005
0.002
0.002
0.002
0.001
0.001
0.001
0.0005
0.0005
0.0005
VOLTS
CDLL941
CDLL941A
CDLL941B
CDLL942
CDLL942A
CDLL942B
CDLL943
CDLL943A
CDLL943B
CDLL944
CDLL944A
CDLL944B
CDLL945
CDLL945A
CDLL945B
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 - 12.28
11.12 -12.28
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
7.5
7.5
7.5
OHMS
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
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.
NOTE 1
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.
NOTE 2
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
Dissipation (mW)
Pd, Rated Power
CDLL941
CDLL945B
thru
600
500
400
300
200
100
0
0
25
50
75
100
125
TL, Ambient temperature (°C)
150
175
FIGURE 2
POWER DERATING CURVE
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
+.0010
+.0005
0
-.0005
-.0010
5.5
6.0
6.5
7.0
7.5 8.0
8.5
OPERATING CURRENT lZT (mA)
9.0
9.5
FIGURE 3
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT
100
50
ZENER IMPEDANCE Z
ZT
(OHMS)
20
10
5
2
1
5
6
7
8
9
OPERATING CURRENT lZT (mA)
10
FIGURE 4
ZENER IMPEDANCE VS. OPERATING CURRENT
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