Absolute Maximum Ratings *

Tolerance = 5%

TA = 25°C unless otherwise noted

Symbol
PD

Parameter
Power Dissipation
@ TL ≤ 75°C, Lead Length = 3/8”

TJ, TSTG

Operating and Storage Temperature Range

Value
500

Units
mW

4.0

mW/°C

-65 to +200

°C

Derate above 75°C

* These ratings are limiting values above which the serviceability of the diode may be impaired.

DO-35 Glass case
COLOR BAND DENOTES CATHODE

Electrical Characteristics
Device

TA=25°C unless otherwise noted

VZ (V) @ IZ = 20mA (Note 1)

ZZ (Ω) @ IZ = 20mA

IZM (mA)

30
30
29
28
24

4.10
4.52
4.94
5.36
5.88

6.2
6.8
7.5
8.2
9.1
10
12

1N4370A
1N4371A
1N4372A
1N746A
1N747A

Min.
2.28
2.57
2.85
3.14
3.42

Typ.
2.4
2.7
3.0
3.3
3.6

Max.
2.52
2.84
3.15
3.47
3.78

1N748A
1N749A
1N750A
1N751A
1N752A

3.71
4.09
4.47
4.85
5.32

3.9
4.3
4.7
5.1
5.6

1N753A
1N754A
1N755A
1N756A
1N757A

5.89
6.46
7.13
7.79
8.65

1N758A
1N759A

9.50
11.40

IR (µA) @ VR = 1V

150
135
120
110
100

Ta = 25°C
100
75
50
10
10

Ta = 125°C
200
150
100
30
30

23
22
19
17
11

95
85
75
70
65

10
2
2
1
1

30
30
30
20
20

6.51
7.14
7.88
8.61
9.56

7
5
6
8
10

60
55
50
45
40

0.1
0.1
0.1
0.1
0.1

20
20
20
20
20

10.5
12.6

17
30

35
30

0.1
0.1

20
20

(Note 2)

VF Forward Voltage = 1.5V Max @ IF = 200mA
Notes:
1. Zener Voltage (VZ)
The zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C ± 1°C and 3/8” lead length.
2. Maximum Zener Current Ratings (IZM)
The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve.

©2004 Fairchild Semiconductor Corporation

1N4370A - 1N4372A 1N746A - 1N759A, Rev. C1

Zeners 1N4370A - 1N4372A 1N746A - 1N759A

Zeners
1N4370A - 1N4372A
1N746A - 1N759A

Device
1N4370A
1N4371A
1N4372A
1N746A
1N747A

Line 1
LOGO
LOGO
LOGO
LOGO
LOGO

Line 2
437
437
437
746
747

Line 3
0A
1A
2A
A
A

Line 5
XY
XY
XY
XY
XY

1N748A
1N749A
1N750A
1N751A
1N752A

LOGO
LOGO
LOGO
LOGO
LOGO

748
749
750
751
752

A
A
A
A
A

XY
XY
XY
XY
XY

1N753A
1N754A
1N755A
1N756A
1N757A

LOGO
LOGO
LOGO
LOGO
LOGO

753
754
755
756
757

A
A
A
A
A

XY
XY
XY
XY
XY

1N758A
1N759A

LOGO
LOGO

758
759

A
A

XY
XY

©2004 Fairchild Semiconductor Corporation

1N4370A - 1N4372A 1N746A - 1N759A, Rev. C1

Zeners 1N4370A - 1N4372A 1N746A - 1N759A

Top Mark Information

F

522
9B
XY

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2nd line: Device Name - 3rd to 5th characters of the device name.
or 4th to 6th characters for BZXyy series
3rd line: Device Name - 6th to 7th characters of the device name.
or Voltage rating for BZXyy series
4th line: Device Code or - Two Digit - Six Weeks Date Code.
Date code plus or Two Digit - Six Weeks Date Code
Large die identification plus Large die identification, “L”

General Requirements:
1.0 Cathod Band
2.0 First Line: F - Fairchild Logo
3.0 Second Line: Device name - For 1Nxx series: 3rd to 5th characters of the device name.
For BZxx series: 4th to 6th characters of the device name.
4.0 Third Line: Device name - For 1Nxx series: 6th to 7th characters of the device name.
For BZXyy series: Voltage rating
5.0 Fourth Line: XY or XYL - Two Digit - Six Weeks Date Code
Where: X represents the last digit of the calendar year
Y represents the Six weeks numeric code
L represents the Large die identification
6.0 Devices shall be marked as required in the device specification (PID or FSC Test Spec).
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©2004 Fairchild Semiconductor Corporation

1N4370A - 1N4372A 1N746A - 1N759A, Rev. C1

Zeners 1N4370A - 1N4372A 1N746A - 1N759A

Top Mark Information (Continued)

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Advance Information

Formative or
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This datasheet contains the design specifications for
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Rev. I10