1N4763A-T

Overview

The 1N4763A-T 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 a maximum dynamic impedance (Zzt) of 3000 Ohms. Reverse leakage current is specified at 5 µA when measured at 69.2 V. The forward voltage is 1.2 V at a test current of 200 mA. It operates within a junction temperature range up to 175°C and is housed in an axial DO-41 package.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features high thermal stability with a maximum junction temperature rating of 175°C
• Constructed using silicon technology for reliable unidirectional voltage regulation

Applications

• Voltage regulation in electronic circuits
• Protection against voltage spikes
• Reference voltage sources in measurement equipment

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than bulk or cut tape, as this affects handling and assembly processes. Confirm RoHS compliance status and lead-free terminal availability through official datasheets before procurement. Ensure the supplier provides valid traceability documentation for automotive-grade AEC-Q101 qualification if required for the application.

Selection Notes

Select this component when a precise 91 V reference is needed with tight ±5% tolerance. Consider the 3000 Ohm dynamic impedance for applications requiring moderate regulation accuracy. Verify that the DO-41 through-hole package fits the PCB layout constraints. Compare against surface mount equivalents like SMAJ4763A if space optimization is necessary.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes, widely used for general-purpose voltage regulation. The 'A' suffix denotes the tighter ±5% voltage tolerance compared to standard versions. Vishay produces this series in various packages including DO-41 for through-hole applications, catering to diverse industrial and consumer electronics needs.

Replacement Considerations

Surface mount equivalents include SMAJ4763A and MLL4763A. For MIL-spec requirements, variants with MQ, MX, MV, or MSP prefixes are available. Verify pinout compatibility and thermal characteristics when substituting with generic 91V Zener diodes from other manufacturers.