1N4763A-TR

Overview

The 1N4763A-TR is a single silicon Zener diode manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 91 V with a tolerance of ±5%. The device has a maximum power dissipation of 1.3 W and is housed in an axial DO-204AL (DO-41) package for through-hole mounting. Key electrical characteristics include a maximum dynamic impedance of 250 Ohms and a reverse leakage current of 5 µA at 69.2 V. The forward voltage is 1.2 V at 200 mA. It supports a junction temperature up to 175°C and holds AEC-Q101 automotive qualification.

Feature Summary

• Provides stable voltage regulation at a nominal 91 V level
• Qualified for automotive applications under AEC-Q101 standards
• Capable of operating at elevated junction temperatures up to 175°C

Applications

• Automotive electronic circuits requiring voltage reference
• General-purpose voltage regulation in industrial equipment
• Overvoltage protection in high-voltage DC systems

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm packaging type, as variations exist between tape-and-reel, cut tape, and ammo pack formats. Ensure the required voltage tolerance and power rating align with the design specifications before procurement. Cross-reference the exact part number to distinguish between active and obsolete status variants within the 1N4763 series.

Selection Notes

Select this component when a precise 91 V reference is needed in a through-hole configuration. The DO-41 package offers robust mechanical stability for axial wiring. Consider the 250 Ohm dynamic impedance for load regulation requirements. Verify that the 1.3 W power rating suffices for the expected thermal environment without excessive heat sinking.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes, widely used for voltage clamping and regulation. The 'A' suffix typically denotes a tighter tolerance band compared to non-suffixed versions. The '-TR' suffix indicates a specific reel packaging format intended for automated assembly processes, distinguishing it from bulk or cut-tape alternatives.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4763A equivalents in DO-41 packages. Ensure replacement parts match the 91 V nominal voltage, 1.3 W power rating, and ±5% tolerance. Verify that any alternative also meets AEC-Q101 requirements if automotive qualification is mandatory for the application.