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Texas Instruments 1N4933 - 1N4937 Data Handbook

Summary

These fast rectifier diodes are engineered for dependable AC/DC power conversion in demanding electronic circuits. The accompanying datasheet provides comprehensive technical specifications, including absolute maximum ratings, thermal resistance profiles, forward voltage drop characteristics, and non-repetitive surge current handling across various temperatures. This manual is essential resource for circuit designers who require high-reliability semiconductor components for robust power supply applications.

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Features Low forward voltage drop. High surge current capability. • High reliability.

• High current capability. DO-41 COLOR BAND DENOTES CATHODE

Fast Rectifiers Absolute Maximum Ratings* TA = 25°C unless otherwise noted Symbol Parameter Value Units 4933 4934 4935 4936 4937 VRRM Maximum Repetitive Reverse Voltage 50 100 200 400 600 V IF(AV) Average Rectified Forward Current,

.375 " lead length @ TA = 50°C 1.0 A

IFSM Non-repetitive Peak Forward Surge Current

8.3 ms Single Half-Sine-Wave 30 A

Tstg Storage Temperature Range -50 to +150 °C TJ Operating Junction Temperature -50 to +150 °C

*These ratings are limiting values above which the serviceability of any semiconductor device may be impaired.

Thermal Characteristics Symbol Parameter Value Units PD Power Dissipation 2.5 W RθJA Thermal Resistance, Junction to Ambient 50 °C/W

Electrical Characteristics TA = 25°C unless otherwise noted Symbol Parameter Device Units 4933 4934 4935 4936 4937 VF Forward Voltage @ 1.0 A 1.2 V trr Reverse Recovery Time

IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A 150 ns

IR Reverse Current @ rated VR TA = 25°C 5.0 µA

TA = 125°C µA

CT Total Capacitance

VR = 4.0 V, f = 1.0 MHz 12 p F

1N4933-1N4937, Rev. C2001 Fairchild Semiconductor Corporation

Page Summary Contents For Texas Instruments 1N4933 - 1N4937 Data Handbook

Page 1 Features Low forward voltage drop. High surge current capability. • High reliability. • High current capability. DO-41 COLOR BAND DENOTES CATHODE Fast Rectifiers Absolute Maximum Ratings* TA = 25°C un...
Page 2 1N 4933-1N Typical Characteristics ve ra ge ec tif ie Fo rw ar ur re nt , I [A Pe ak or ar Su rg ur re nt , I [A 0.6 SINGLE PHASE HALF WAVE 0.3 0.4 60HZ RESISTIVE OR INDUCTIVE LOAD 0.2 .375" 9.0 ...
Page 3 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ FAST...

Manual Details

Brand Texas Instruments
Pages 3
File Size 45.50 KB
Published July 10, 2026
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Frequently Asked Questions

What is the absolute maximum repetitive reverse voltage rating for these diodes?

The ratings vary by model: 1N4933 is 50V, 1N4937 is 600V.

Under what conditions are the specified electrical ratings provided?

All listed values (e.g., Forward Voltage, Current) are based on an ambient temperature of T = 25°C unless noted otherwise.

Are these components suitable for life support applications?

No, Fairchild's products are not authorized for use as critical components in life support devices or systems without express written approval.

How does the diode handle high current surges?

The non-repetitive peak forward surge current (FSM) rating varies across models, with 1N4937 rated at 30A for 8.3 ms.