1N6346

Overview

The Microchip Technology 1N6346 is a military-qualified, hermetically sealed glass Zener diode with a nominal voltage of 82.0 V and a standard tolerance of ±5%. It operates within a junction temperature range of -65°C to +175°C and features a steady-state power dissipation of 0.5 W at a lead temperature of 75°C. The device exhibits a maximum reverse current of 10 µA at 25°C and 80 µA at 150°C, with a dynamic impedance of 0.115 Ω at the test current of 220 mA. It supports a maximum regulator current of 62 mA and withstands a surge current of 0.5 A for an 8.3 ms square wave.

Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high-reliability environments.
• Qualified per MIL-PRF-19500/533 for JAN, JANTX, JANTXV, and JANS reliability levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Applications

• High-reliability voltage regulation where failure cannot be tolerated.
• Military and aerospace electronic systems requiring radiation hardness.
• Precision reference circuits in extreme temperature environments.

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this affects qualification standards. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS versions are commercial grade only. Ensure the ordering suffix matches the desired voltage tolerance and terminal finish specifications defined in the part nomenclature section.

Selection Notes

Select the 1N6346 when an 82 V Zener reference is needed in a DO-35 axial-lead package. Consider tighter tolerances (±1% or ±2%) if available via specific ordering suffixes. Evaluate thermal derating curves based on lead temperature constraints, as the junction-to-lead thermal resistance varies by series group. Ensure the operating current remains within the specified IZM limits to maintain stable voltage regulation.

Part Context

This component belongs to the 1N6309 through 1N6355D series of 500 mW glass Zener diodes. The series offers a broad selection of voltages from 2.4 V to 200 V. The 1N6346 specifically falls within the higher voltage range of this lineup, sharing common packaging and qualification standards with its peers while providing distinct electrical characteristics suited for mid-to-high voltage regulation tasks.

Replacement Considerations

Direct substitutes must match the 82 V nominal Zener voltage, 0.5 W power rating, and DO-35 package. Verify that any replacement meets the same MIL-PRF-19500/533 reliability level and hermetic sealing requirements. Check compatibility with existing thermal management designs due to similar thermal resistance profiles.