• 1N935B-1, 1N937B-1 AND 1N938B-1 AVAILABLE IN
JAN
,
JANTX, JANTXV
AND JANS
PER MIL-PRF-19500/156
• 9.0 VOLT NOMINAL ZENER VOLTAGE
• TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
• METALLURGICALLY BONDED
1N935 thru 1N938B
and
1N935B-1 thru 1N938B-1
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
= 10
µ
A @ 25°C & V
R
= 6 Vdc
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
JEDEC
TYPE
NUMBER
ZENER
VOLTAGE
vz @ I
ZT
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
(Note 1)
Z
ZT
VOLTAGE
TEMPERATURE
TEMPERATURE
RANGE
STABILITY
∆V
ZT
MAXIMUM
(Note 2)
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
VOLTS
1N935
1N935A
1N935B
1N936
1N936A
1N936B
1N937
1N937A
1N937B
1N938
1N938A
1N938B
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
8.55—9.45
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
OHMS
20
20
20
20
20
20
20
20
20
20
20
20
mV
67
139
184
34
70
92
13
28
37
6.7
13.9
19
°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
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.
NOTE 1
Zener impedance is derived by superimposing on l A 60Hz rms a.c. current equal
ZT
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.
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
Pd, Rated Power
Dissipation (mW)
1N935
thru
INCLUDING -1 VERSIONS
1N938B
600
500
400
300
200
100
0
0
25
50
75
100
125
150
175
TL, Lead temperature (C°) 3/8” from body
FIGURE 2
POWER DERATING CURVE
100
50
40
30
20
ZENER IMPEDANCE Z
(OHMS)
ZT
10
5
4
3
2
1
5
6
7
8
9
OPERATING CURRENT lZT (mA)
10
FIGURE 3
ZENER IMPEDANCE VS. OPERATING CURRENT
+.0015
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
+.0010
+.0005
0
-.0005
-.0010
-.0015
5
6
7
8
OPERATING CURRENT lZT (mA)
9
10
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT
MCU
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