1N4758A-T

Overview

The 1N4758A-T is a discontinued silicon planar power Zener diode manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 56 V with a tolerance of ±5% and a maximum power dissipation of 1.3 W. The device utilizes a DO-41 axial through-hole package and supports an operating temperature range up to 175°C. It holds AEC-Q101 automotive qualification. Key electrical characteristics include a forward voltage of 1.2 V at 200 mA, a maximum dynamic impedance of 2000 Ohms, and a reverse leakage current of 5 µA at 42.6 V.

Feature Summary

• Provides stable voltage regulation for stabilizing and clipping circuits in industrial applications
• Features glass passivation for hermetic sealing and enhanced stability
• Automotive qualified under AEC-Q101 standards for reliability

Applications

• Voltage regulation in industrial equipment
• Clipping circuits in entertainment systems
• Military and space applications requiring high reliability

Procurement Notes

This component is officially obsolete and no longer manufactured by the supplier. Verification of availability requires checking authorized distributors for remaining stock or approved direct substitutes such as the 1N4758A-TR variant from the same manufacturer. Ensure any replacement maintains identical electrical specifications and package compatibility to preserve circuit integrity.

Selection Notes

Select this component for designs requiring a 56 V Zener reference with 1.3 W power handling in a DO-41 through-hole form factor. Verify that the application environment does not exceed the 175°C junction temperature limit. Consider the AEC-Q101 qualification if the deployment involves automotive electronics. Confirm that the ±5% voltage tolerance meets the specific circuit requirements.

Part Context

The 1N4758A-T belongs to the broader 1N47xx series of silicon Zener diodes designed for general-purpose voltage regulation. These components are characterized by their robust glass passivation and axial leaded construction, making them suitable for environments demanding high stability and reliability across wide temperature ranges.

Replacement Considerations

The 1N4758A-TR is listed as a direct substitute from Vishay General Semiconductor - Diodes Division.