1N4117/TR

Single Zener Diodes Overview

The Microchip Technology 1N4117/TR is a unidirectional voltage regulator diode featuring a 25V nominal Zener voltage. It operates within a temperature range of -65°C to +175°C and dissipates up to 0.5W. The device utilizes a hermetically sealed glass DO-35 (DO-204AH) axial-lead package with two terminals. Electrical characteristics include a maximum dynamic impedance of 150 Ω, a test current of 250 µA, and a maximum reverse leakage current of 40 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using metallurgically bonded glass technology for high reliability.
• Qualified per MIL-PRF-19500/435 standards for JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard design suitable for demanding environments.
• Low noise density performance optimized for precision regulation applications.

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Precision voltage reference generation
• Harsh environment power supply regulation

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, as the base part number covers multiple qualification grades including JAN, JANTX, JANTXV, and JANS. Confirm RoHS compliance status, noting that commercial versions may differ from military-qualified units. Ensure the TR suffix indicates tape and reel packaging if automated assembly is intended. Cross-reference datasheet T4-LDS-0245-2 for exact electrical limits.

Single Zener Diodes Selection Notes

Select this component when a 25V Zener reference with strict environmental tolerance is needed. The DO-35 package supports through-hole mounting. Consider the 150 Ω dynamic impedance for load regulation requirements. Verify thermal derating curves against expected ambient temperatures to ensure the 0.5W rating remains sufficient under operating conditions.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of 500 mW metallurgically bonded glass Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series offers voltages ranging from 1.8V to 100V with various tolerance options. These components are designed for high-reliability applications requiring robust performance in extreme conditions.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other JEDEC registered 1N4117 variants from different manufacturers, provided they meet the 25V Zener voltage, 0.5W power dissipation, and DO-35 package constraints. Military-qualified equivalents must match the specific MIL-PRF-19500/435 qualification level required by the system design.