CDIDI 1N938B, 1N938A, 1N938, 1N937B, 1N937A Datasheet

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•

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

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.

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= 10µ A @ 25°C & VR= 6 Vdc

ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified.

NOTE 1 Zener impedance is derived by superimposing on lZTA 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.

JEDEC ZENER ZENER MAXIMUM VOLTAGE TEMPERATURE EFFECTIVE

TYPE VOLTAGE TEST ZENER TEMPERATURE RANGE TEMPERATURE

NUMBER CURRENT IMPEDANCE STABILITY COEFFICIENT

vz@ I

ZT

I

ZT

(Note 1) ∆V

ZT

Z

ZT

MAXIMUM

(Note 2)

VOLTS mA OHMS mV °C % / °C

1N935 8.55—9.45 7.5 20 67 0 to + 75 0.01
1N935A 8.55—9.45 7.5 20 139 -55 to +100 0.01
1N935B 8.55—9.45 7.5 20 184 -55 to +150 0.01

1N936 8.55—9.45 7.5 20 34 0 to + 75 0.005
1N936A 8.55—9.45 7.5 20 70 -55 to +100 0.005
1N936B 8.55—9.45 7.5 20 92 -55 to +150 0.005

1N937 8.55—9.45 7.5 20 13 0 to + 75 0.002
1N937A 8.55—9.45 7.5 20 28 -55 to +100 0.002
1N937B 8.55—9.45 7.5 20 37 -55 to +150 0.002

1N938 8.55—9.45 7.5 20 6.7 0 to + 75 0.001
1N938A 8.55—9.45 7.5 20 13.9 -55 to +100 0.001
1N938B 8.55—9.45 7.5 20 19 -55 to +150 0.001

1N935 thru 1N938B

INCLUDING -1 VERSIONS

0 25 50 75 100 125 150 175

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)

5678910

OPERATING CURRENT lZT(mA)

FIGURE 3

ZENER IMPEDANCE VS. OPERATING CURRENT

5678910

OPERATING CURRENT lZT(mA)

FIGURE 4

TYPICAL CHANGE OF TEMPERATURE COEFFICIENT

WITH CHANGE IN OPERATING CURRENT

+.0015

+.0010

+.0005

0

-.0005

-.0010

-.0015

CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)

100

50
40
30

20

10

5
4
3

2

1

ZENER IMPEDANCE Z

ZT

(OHMS)