1N4099D/TR

Single Zener Diodes Overview

The Microchip Technology 1N4099D/TR is a 6.8 V precision Zener diode with 1% voltage tolerance, housed in an axial-lead DO-35 glass package. It operates within a -65°C to +175°C temperature range and dissipates up to 500 mW. The device features low noise density (40 μV/√Hz), minimal capacitance, and inherent radiation hardness. Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS reliability levels, it provides stable voltage regulation across broad current ranges.

Single Zener Diodes Feature Summary

• Hermetically sealed axial-lead glass construction with internal metallurgical bond
• Inherently radiation hard and non-sensitive to ESD
• Low noise density and minimal capacitance for sensitive applications
• Qualified to high-reliability military standards including JANS

Single Zener Diodes Applications

• High-reliability aerospace and defense systems
• Precision voltage reference circuits
• Over-voltage protection in harsh environments
• Radiation-hardened electronic designs

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging as defined by EIA-296 standards. Confirm that the 'D' suffix corresponds to the 1% tolerance variant. Ensure the required reliability level (JAN, JANTX, JANTXV, or JANS) matches the procurement specification, as these are distinct qualification tiers under MIL-PRF-19500/435.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, radiation-tolerant Zener diode is required for critical applications. The 1% tolerance ensures tight voltage accuracy. Consider the axial-lead DO-35 package for through-hole mounting. Evaluate the 500 mW power dissipation limit against thermal derating curves for operating temperatures above 25°C.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mW metallurgically bonded glass Zener diodes. The series offers voltages from 1.8 V to 100 V with various tolerances. It is JEDEC registered and available in commercial, JAN, JANTX, JANTXV, and JANS grades, providing flexibility for different reliability requirements.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N4099 variants with matching tolerance and package. Verify compatibility with MIL-PRF-19500/435 qualifications if military-grade reliability is mandatory. Surface mount equivalents like 1PMT4099 exist but require different mounting considerations.