1N4109D-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4109D-1/TR is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 15 V with a tight tolerance of ±1%. The device operates at a test current of 250 µA, featuring a maximum dynamic impedance of 100 Ohms and a reverse leakage current of 50 nA. Qualified per MIL-PRF-19500/435 for high reliability, it supports a junction temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Metallurgically bonded construction within a hermetically sealed glass DO-35 package.
• Qualified to JANS level per MIL-PRF-19500/435 for high-reliability applications.
• Low noise density characteristics suitable for precision regulation.
• Inherently radiation hard design.

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Radiation-hardened electronic systems
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix 'TR' indicates tape and reel packaging as defined by EIA-296 standards. Confirm that the 'D' suffix corresponds to the required 1% voltage tolerance. Ensure procurement channels provide documentation verifying JANS qualification levels if mission-critical reliability is required.

Single Zener Diodes Selection Notes

Select this component when a 15 V reference with strict 1% tolerance is needed in a through-hole environment. Consider the low reverse leakage and noise density for sensitive analog front ends. Verify thermal derating requirements against the 500 mW power dissipation limit at elevated ambient temperatures.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener diodes. The series offers voltages from 1.8 V to 100 V with various tolerance options. The 'D' designation specifies the 1% tolerance variant, while the 'TR' suffix denotes the tape and reel packaging format.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers include 1N4109D-1 (bulk packaging) and commercial equivalents such as 1N4109 without the military suffixes. Verify pinout compatibility and ensure replacement parts meet the same MIL-PRF-19500/435 qualification if radiation hardness is required.

Single Zener Diodes FAQ

What does the 'D' suffix indicate in the part number?

The 'D' suffix indicates a Zener voltage tolerance of ±1%, which is tighter than the standard ±5% tolerance found in the base JEDEC numbering.

Is the 1N4109D-1/TR RoHS compliant?

RoHS compliance is available only on commercial grade versions. Military qualified levels like JANTX or JANS typically utilize tin-lead terminations and may not be RoHS compliant unless specified otherwise by the manufacturer.