1N5533D

Overview

The Microchip Technology 1N5533D is a hermetically sealed Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 13 V with a test current of 1 mA and a maximum impedance of 90 Ohms. The device operates in the DO-35 axial leaded package, supporting through-hole mounting. It provides a power dissipation rating of 500 mW and maintains functionality across an extended temperature range from -65 °C to +175 °C junction temperature.

Feature Summary

• Hermetically sealed glass construction ensures reliability in harsh environments
• Avalanche breakdown mechanism provides stable voltage regulation characteristics
• Extended thermal capability supports operation up to 175 °C junction temperature

Applications

• Military aerospace voltage reference circuits
• High-reliability industrial power supply regulation
• Harsh environment protection networks

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm exact tolerance and testing requirements. Ensure procurement channels are authorized to guarantee component authenticity and traceability. Confirm RoHS compliance status as military variants may differ from commercial standards. Validate package dimensions against design constraints prior to ordering.

Selection Notes

Select this component when hermetic sealing and high-temperature stability are mandatory. Compare impedance specifications against circuit sensitivity requirements. Verify that the DO-35 package fits the intended PCB layout. Consider thermal management strategies given the 500 mW dissipation limit at elevated ambient temperatures.

Part Context

This part belongs to the standard 1N55xx series of low-power Zener diodes manufactured by Microchip Technology. The series offers various voltage options within a consistent physical form factor. The 1N5533D specifically targets the 13 V regulation point within this lineup, providing a standardized solution for discrete voltage clamping tasks.

Replacement Considerations

Consult official cross-reference tools for verified equivalents. Generic replacements may lack the required hermetic seal or temperature range. Verify pinout compatibility and electrical parameter tolerances before substitution.