1N4463US

Single Zener Diodes Overview

The Microchip Technology 1N4463US is a surface mount Zener voltage regulator with an 8.2V nominal breakdown voltage and a 1.5W steady-state power dissipation rating. It utilizes a void-less hermetically sealed glass MELF (D-5A) package featuring internal metallurgical bonds. The device operates within a junction temperature range of -65°C to +175°C, exhibits a maximum dynamic impedance of 3 Ohms at the test current of 31mA, and maintains a maximum reverse leakage current of 0.5µA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using void-less hard glass and tungsten slugs for extreme robustness.
• Military qualification available per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels.
• Internal metallurgical bonding ensures high reliability in applications where failure cannot be tolerated.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Radiation-hardened electronic systems
• Military and aerospace equipment requiring MIL-PRF-19500/406 compliance

Single Zener Diodes Procurement Notes

Verify the specific reliability level suffix (JAN, JANTX, JANTXV, or JANS) required for your application, as these designations dictate the manufacturing quality and testing standards. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are typically commercial grade only. Ensure the ordering part number matches the exact tolerance requirements specified in the datasheet electrical characteristics table.

Single Zener Diodes Selection Notes

Select this component when a 1.5W surface mount Zener diode with hermetic sealing is necessary. The 1N4463US provides an 8.2V reference point with a standard 5% tolerance. Consider the D-5A MELF package dimensions for PCB layout constraints. Evaluate thermal management requirements based on the 20°C/W junction-to-end cap thermal resistance and the operating temperature range up to +175°C.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of 1.5-watt Zener voltage regulators. These components serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series offers extensive voltage selections ranging from 3.3V to 200V, catering to diverse voltage regulation needs in compact electronic designs.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4460US–1N4496US series or equivalent military-qualified Zener diodes in the D-5A MELF package. Verify that substitute components match the 8.2V Zener voltage, 1.5W power rating, and hermetic sealing requirements.