1N6339

Overview

The Microchip Technology 1N6339 is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a 43V nominal Zener voltage with standard 5% tolerance, operating at a test current of 3mA. The device provides a maximum dynamic impedance of 65 Ohms and supports a maximum steady-state power dissipation of 0.5W. It operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed voidless-glass construction using internal metallurgical bonds
• Qualified per MIL-PRF-19500/533 for JAN, JANTX, JANTXV, and JANS reliability levels
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020

Applications

• High-reliability aerospace and defense circuits
• Voltage regulation in extreme temperature environments
• Radiation-hardened electronic systems
• Critical infrastructure requiring failure-intolerant components

Procurement Notes

Verify the specific ordering suffix to confirm the required reliability level (JAN, JANTX, JANTXV, or JANS) and RoHS compliance status. Commercial versions may differ in packaging and material composition compared to qualified military grades. Confirm package availability (DO-35 axial lead or B-SQ MELF surface mount) matches the intended assembly process before procurement.

Selection Notes

Select this component when a robust, hermetically sealed Zener diode is required for critical voltage reference applications. Ensure the system can accommodate the 0.5W power rating and verify that the 43V breakdown voltage aligns with circuit requirements. Consider tighter tolerance variants if standard 5% accuracy is insufficient for the design specifications.

Part Context

This part belongs to the industry-recognized 1N6309 through 1N6355 series of 0.5-watt glass Zener regulators. The series offers extensive voltage selections from 2.4V to 200V. The 1N6339 specifically addresses mid-range voltage regulation needs within this established family of military-grade semiconductor devices.

Replacement Considerations

Equivalent parts include JAN1N6339, JANTX1N6339, JANTXV1N6339, and JANS1N6339. Surface-mount equivalents are available as 1N6339US or 1N6339DUS. Verify that substitute packages maintain compatible thermal and mechanical characteristics.