1N4099D

Single Zener Diodes Overview

The Microchip Technology 1N4099D is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 6.8 V with a tight 1% tolerance. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 1 µA at the specified voltage. Electrical characteristics include a test current of 250 µA, a dynamic impedance of 200 Ohms, and a noise density of 40 µV/√Hz.

Single Zener Diodes Feature Summary

• Metallurgically bonded internal construction for high reliability
• Hermetically sealed glass DO-35 axial-lead package
• Qualified per MIL-PRF-19500/435 standards
• Inherently radiation hard

Single Zener Diodes Applications

• High-reliability military applications
• Voltage regulation over broad current ranges
• Temperature-stable reference circuits

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level (e.g., JAN, JANTX, JANTXV, or JANS) as commercial versions differ from mil-qualified parts. Confirm RoHS compliance status if applicable, noting that RoHS options are available on commercial grades only. Ensure the 1% tolerance designation aligns with circuit requirements.

Single Zener Diodes Selection Notes

Select this component when a precise 6.8 V reference with 1% accuracy is required in harsh environments. The wide operating temperature range supports extreme conditions. Consider the low capacitance and radiation hardness for specialized aerospace or defense designs where standard commercial diodes may fail.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener regulators. These devices share the same DO-35 package and metallurgical bond technology but vary in nominal voltage from 1.8 V to 100 V. The series offers multiple tolerance grades including 5%, 2%, and 1%.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N4099 variants with different tolerance levels such as 1N4099C (2%) or 1N4099 (5%). Equivalent mil-qualified parts from other manufacturers meeting MIL-PRF-19500/435 specifications may be used if electrical parameters match.