1N5917AP/TR12

Single Zener Diodes Overview

The Microsemi 1N5917AP/TR12 is a glass-encapsulated Zener diode with a nominal voltage of 4.3 V and a 10% tolerance, housed in an axial DO-41 package. It provides 1.5 W steady-state power dissipation at 85°C lead temperature and operates within a -65°C to +175°C junction temperature range. The device features hermetic sealing for high reliability and radiation hardness, with tape-and-reel packaging available.

Single Zener Diodes Feature Summary

• Hermetically sealed glass body construction with tungsten slugs for enhanced thermal performance and reliability
• Inherently radiation hard design suitable for demanding environments
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High reliability electronic circuits requiring hermetic sealing
• Radiation-hardened applications

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR12' against official documentation to confirm tape-and-reel quantity and reel specifications. Confirm RoHS compliance status as commercial grades may differ from military screening levels. Ensure the 10% tolerance (A suffix) matches design requirements. Cross-reference part nomenclature with MicroNote 129 for exact reliability level definitions.

Single Zener Diodes Selection Notes

Select this component when a 4.3 V reference with 10% tolerance is required in a hermetic axial package. Consider the 1.5 W power rating and thermal resistance values for heat dissipation needs. Evaluate the radiation hardness and ESD robustness if the application environment demands these specific reliability characteristics over standard commercial alternatives.

Single Zener Diodes Part Context

This part belongs to the 1N5913BG–1N5956BG series of 1.5 W glass Zener diodes. The series offers voltages from 3.3 V to 200 V with various tolerances. The 'G' suffix denotes the glass casing, while 'A' indicates 10% voltage tolerance. The series includes options for military screening and multiple package types including surface mount variants.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5917B series diodes in DO-41 packages. Verify that replacement devices meet the same hermetic sealing, radiation hardness, and electrical tolerance specifications. Surface mount equivalents like SMAJ5917B require PCB redesign.