1N4740A-T

$0.20

Description：DIODE ZENER 10V 1W DO41
Series：-
Mfr：Diodes Incorporated
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:b01caa5760b8 Category: Single Zener Diodes Brand: Diodes Incorporated

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Product introduction

Product Detailed Parameters

Description：DIODE ZENER 10V 1W DO41
Series：-
Mfr：Diodes Incorporated
Package：Tape & Reel (TR),Cut Tape (CT)
Voltage - Zener (Nom) (Vz)：10 V
Tolerance：±5%
Power - Max：1 W
Impedance (Max) (Zzt)：7 Ohms
Current - Reverse Leakage @ Vr：10 µA @ 7.6 V
Operating Temperature：-65°C ~ 175°C
Mounting Type：Through Hole
Package / Case：DO-204AL, DO-41, Axial
Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
Grade：-
Qualification：-

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1N4740A-T

Overview

The 1N4740A-T is a discontinued 1.0W Zener diode manufactured by Diodes Incorporated, housed in a DO-41 glass package with tape and reel packaging. It features a nominal Zener voltage of 10V at a test current of 25mA, with a standard tolerance of 5%. The device has a maximum Zener impedance of 7 Ohms at the test current and a maximum reverse leakage current of 10µA at 7.6V. It operates within a temperature range of -65°C to +175°C and includes lead-free finish compliant with RoHS directives.

Feature Summary

Provides stable voltage regulation through a sharp breakdown knee characteristic verified by dual-point impedance measurement.
Constructed with a glass case material rated for UL flammability classification 94V-0.
Features tin-silver alloy terminals ensuring solderability per MIL-STD-208 standards.

Applications

Voltage reference circuits requiring stable DC levels
Overvoltage protection stages in power supplies
Clamping applications for transient suppression

Procurement Notes

This component is officially marked as obsolete and discontinued by Diodes Incorporated. No alternate part numbers are provided by the manufacturer. Procurement should focus on verifying legacy stock availability or identifying equivalent specifications from other suppliers, as direct replacement from this specific manufacturer is no longer possible.

Selection Notes

Selection requires acknowledging the obsolete status of this specific Diodes Incorporated part. Designers must evaluate alternative manufacturers offering similar 10V, 1W Zener characteristics in DO-41 packages. Verify that any substitute meets the required thermal resistance, impedance, and leakage current specifications for the intended application environment.

Part Context

The 1N4740A belongs to the 1N4728A through 1N4761A series of 1.0W Zener diodes produced by Diodes Incorporated. This series covers a wide voltage range from 3.3V to 75V. The '-T' suffix specifically denotes the tape and reel packaging format, typically shipped in quantities of 5,000 units per reel.

Replacement Considerations

Diodes Incorporated explicitly states there is no alternate part for this obsolete component. Engineers must source equivalents from other vendors such as Vishay, Nexperia, or onsemi, ensuring mechanical compatibility with the DO-41 footprint and electrical alignment with the 10V/1W requirements.

FAQ

Is the 1N4740A-T currently available for new production?

No, the datasheet explicitly marks the 1N4728A-1N4761A series, including the 1N4740A-T, as obsolete and discontinued with no alternate part provided by Diodes Incorporated.