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onsemi and and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or
subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi
product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without
notice. The information herein is provided “as-is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality,
or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws,
regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/
or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application
by customer’s technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized
for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for
implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees,
subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative
Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others.
 DATA SHEET
www.onsemi.com

Zener Diodes
1N4728A - 1N4758A
ABSOLUTE MAXIMUM RATINGS (Note 1)
Ta = 25°C unless otherwise noted
Symbol Parameter Value Unit AXIAL LEAD
CASE 017AH
PD Power Dissipation 1.0 W
@ TL ≤ 50°C, Lead Length = 3/8″
MARKING DIAGRAM
Derate above 50°C 6.67 mW/°C
TJ, TSTG Operating and Storage Temperature −65 to +200 °C $Y
Range 47
Stresses exceeding those listed in the Maximum Ratings table may damage the 36
device. If any of these limits are exceeded, device functionality should not be A
assumed, damage may occur and reliability may be affected. XY
1. These ratings are limiting values above which the serviceability of the diode
$Y = Logo
may be impaired.
4736A = Specific Device Code
XY = Date Code

ORDERING INFORMATION
See detailed ordering and shipping information on page 3 of
this data sheet.

© Semiconductor Components Industries, LLC, 2009 1 Publication Order Number:

August, 2021 − Rev. 10 1N4736AT/D
 1N4728A − 1N4758A

ELECTRICAL CHARACTERISTICS Ta = 25°C unless otherwise noted

VZ (V) @ IZ (Note 2) Max. Zener Impedance Leakage Current Non−Repetitive

Test Peak Reverse
Current ZZ @ IZ ZZK @ Current
Device Min. Typ. Max. IZ (mA) (W) IZK (W) IZK (mA) IR (mA) VR (V) IZSM (mA) (Note 3)
1N4728A 3.135 3.3 3.465 76 10 400 1 100 1 1380
1N4732A 4.465 4.7 4.935 53 8 500 1 10 1 970
1N4733A 4.845 5.1 5.355 49 7 550 1 10 1 890
1N4734A 5.32 5.6 5.88 45 5 600 1 10 2 810
1N4735A 5.89 6.2 6.51 41 2 700 1 10 3 730
1N4736A 6.46 6.8 7.14 37 3.5 700 1 10 4 660
1N4737A 7.125 7.5 7.875 34 4 700 0.5 10 5 605
1N4738A 7.79 8.2 8.61 31 4.5 700 0.5 10 6 550
1N4739A 8.645 9.1 9.555 28 5 700 0.5 10 7 500
1N4740A 9.5 10 10.5 25 7 700 0.25 10 7.6 454
1N4741A 10.45 11 11.55 23 8 700 0.25 5 8.4 414
1N4742A 11.4 12 12.6 21 9 700 0.25 5 9.1 380
1N4743A 12.35 13 13.65 19 10 700 0.25 5 9.9 344
1N4744A 14.25 15 15.75 17 14 700 0.25 5 11.4 304
1N4745A 15.2 16 16.8 15.5 16 700 0.25 5 12.2 285
1N4746A 17.1 18 18.9 14 20 750 0.25 5 13.7 250
1N4747A 19 20 21 12.5 22 750 0.25 5 15.2 225
1N4748A 20.9 22 23.1 11.5 23 750 0.25 5 16.7 205
1N4749A 22.8 24 25.2 10.5 25 750 0.25 5 18.2 190
1N4750A 25.65 27 28.35 9.5 35 750 0.25 5 20.6 170
1N4751A 28.5 30 31.5 8.5 40 1000 0.25 5 22.8 150
1N4752A 31.35 33 34.65 7.5 45 1000 0.25 5 25.1 135
1N4753A 34.2 36 37.8 7 50 1000 0.25 5 27.4 125
1N4754A 37.05 39 40.95 6.5 60 1000 0.25 5 29.7 115
1N4755A 40.85 43 45.15 6 70 1500 0.25 5 32.7 110
1N4756A 44.65 47 49.35 5.5 80 1500 0.25 5 35.8 95
1N4757A 48.45 51 53.55 5 95 1500 0.25 5 38.8 90
1N4758A 53.2 56 58.8 4.5 110 2000 0.25 5 42.6 80
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.

NOTES:
2. 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.
3. 2 Square wave Reverse Surge at 8.3 ms soak time.

www.onsemi.com
2
 1N4728A − 1N4758A

TOP MARKING AND ORDERING INFORMATION

Top Marking

Device Line 1 Line 2 Line 3 Line 4 Line 5 Package Shipping†

1N4728A LOGO 47 28 A XY Axial Lead 3000 / Bulk Bag
(Pb*Free / Halide Free)
1N4728A−T50A 3000 / Fan−Fold
1N4728ATR 3000 / Tape and Reel
1N4732A 32 3000 / Bulk Bag
1N4732A−T50A 3000 / Fan−Fold
1N4732ATR 3000 / Tape and Reel
1N4733A 33 3000 / Bulk Bag
1N4733A−T50A 3000 / Fan−Fold
1N4733A−T50R 3000 / Tape and Reel
1N4733ATR 3000 / Tape and Reel
1N4734A 34 3000 / Bulk Bag
1N4734A−T50A 3000 / Fan−Fold
1N4734A−T50R 3000 / Tape and Reel
1N4734ATR 3000 / Tape and Reel
1N4735A 35 3000 / Bulk Bag
1N4735A−T50A 3000 / Fan−Fold
1N4735A−T50R 3000 / Tape and Reel
1N4735ATR 3000 / Tape and Reel
1N4736A 36 3000 / Bulk Bag
1N4736A−T50A 3000 / Fan−Fold
1N4736A−T50R 3000 / Tape and Reel
1N4736ATR 3000 / Tape and Reel
1N4737A 37 3000 / Bulk Bag
1N4737A−T50A 3000 / Fan−Fold
1N4737ATR 3000 / Tape and Reel
1N4738A 38 3000 / Bulk Bag
1N4738A−T50A 3000 / Fan−Fold
1N4738A−T50R 3000 / Tape and Reel
1N4738ATR 3000 / Tape and Reel
1N4739A 39 3000 / Bulk Bag
1N4739A−T50A 3000 / Fan−Fold
1N4739ATR 3000 / Tape and Reel
1N4740A 40 3000 / Bulk Bag
1N4740A−T50A 3000 / Fan−Fold
1N4740ATR 3000 / Tape and Reel
1N4741A 41 3000 / Bulk Bag
1N4741A−T50A 3000 / Fan−Fold
1N4741ATR 3000 / Tape and Reel
1N4742A 42 3000 / Bulk Bag
1N4742A−T50A 3000 / Fan−Fold
1N4742ATR 3000 / Tape and Reel

www.onsemi.com
3
 1N4728A − 1N4758A

TOP MARKING AND ORDERING INFORMATION (continued)

Top Marking

Device Line 1 Line 2 Line 3 Line 4 Line 5 Package Shipping†

1N4743A LOGO 47 43 A XY Axial Lead 3000 / Bulk Bag
(Pb*Free / Halide Free)
1N4743A−T50A 3000 / Fan−Fold
1N4743ATR 3000 / Tape and Reel
1N4744A 44 3000 / Bulk Bag
1N4744A−T50A 3000 / Fan−Fold
1N4744A−T50R 3000 / Tape and Reel
1N4744ATR 3000 / Tape and Reel
1N4745A 45 3000 / Bulk Bag
1N4745A−T50A 3000 / Fan−Fold
1N4745ATR 3000 / Tape and Reel
1N4746A 46 3000 / Bulk Bag
1N4746A−T50A 3000 / Fan−Fold
1N4746ATR 3000 / Tape and Reel
1N4747A 47 3000 / Bulk Bag
1N4747A−T50A 3000 / Fan−Fold
1N4747ATR 3000 / Tape and Reel
1N4748A 48 3000 / Bulk Bag
1N4748A−T50A 3000 / Fan−Fold
1N4748ATR 3000 / Tape and Reel
1N4749A 49 3000 / Bulk Bag
1N4749A−T50A 3000 / Fan−Fold
1N4749A−T50R 3000 / Tape and Reel
1N4749ATR 3000 / Tape and Reel
1N4750A 50 3000 / Bulk Bag
1N4750A−T50A 3000 / Fan−Fold
1N4750ATR 3000 / Tape and Reel
1N4751A 51 3000 / Bulk Bag
1N4751A−T50A 3000 / Fan−Fold
1N4751ATR 3000 / Tape and Reel
1N4752A 52 3000 / Bulk Bag
1N4752A−T50A 3000 / Fan−Fold
1N4752ATR 3000 / Tape and Reel
1N4753A 53 3000 / Bulk Bag
1N4753A−T50A 3000 / Fan−Fold
1N4754A 54 3000 / Bulk Bag
1N4754A−T50A 3000 / Fan−Fold
1N4755A 55 3000 / Bulk Bag
1N4755A−T50A 3000 / Fan−Fold
1N4756A 56 3000 / Bulk Bag
1N4757A 57 3000 / Bulk Bag

www.onsemi.com
4
 1N4728A − 1N4758A

TOP MARKING AND ORDERING INFORMATION (continued)

Top Marking

Device Line 1 Line 2 Line 3 Line 4 Line 5 Package Shipping†

1N4758A LOGO 47 58 A XY Axial Lead 3000 / Bulk Bag
(Pb*Free / Halide Free)
1N4758A−T50A 3000 / Fan−Fold
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.

www.onsemi.com
5
 MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS

AXIAL LEAD / DO−41

CASE 017AH
ISSUE O
DATE 31 AUG 2016

25.40 MIN (2X)

5.20
4.06

0.86
0.71

NOTES: UNLESS OTHERWISE SPECIFIED

A) PACKAGE STANDARD REFERENCE:

JEDEC DO−204 VARIATION AL.
B) PACKAGE BODY CAN BE PLASTIC OR
HERMETICALLY SEALED GLASS.
2.72 C) ALL DIMENSIONS ARE IN MILLIMETERS.
2.03

Electronic versions are uncontrolled except when accessed directly from the Document Repository.
DOCUMENT NUMBER: 98AON13444G Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.

DESCRIPTION: AXIAL LEAD / DO−41 PAGE 1 OF 1

onsemi and are trademarks of Semiconductor Components Industries, LLC dba onsemi or its subsidiaries in the United States and/or other countries. onsemi reserves
the right to make changes without further notice to any products herein. onsemi makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation
special, consequential or incidental damages. onsemi does not convey any license under its patent rights nor the rights of others.

© Semiconductor Components Industries, LLC, 2016 www.onsemi.com

 onsemi, , and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates
and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.
A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi reserves the right to make changes at any time to any
products or information herein, without notice. The information herein is provided “as−is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the
information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use
of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products
and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information
provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/or specifications can and do vary in different applications and actual performance may
vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license
under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems
or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should
Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

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