1N6348US

Overview

The Microchip Technology 1N6348US is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a voidless hermetically sealed glass package with tungsten slugs and internal metallurgical bonds. The device operates within a junction temperature range of -65°C to +175°C and provides a nominal Zener voltage of 100V at a test current of 1.3mA. It offers a maximum steady-state power dissipation of 0.5W, a dynamic impedance of 340 ohms at the test current, and a surge current rating of 2.4A.

Feature Summary

• Hermetically sealed voidless hard glass construction with tungsten slugs
• Internal metallurgical bonding for enhanced structural integrity
• Qualified per MIL-PRF-19500/533 standards
• Inherently radiation hard

Applications

• High-reliability aerospace systems
• Military electronic circuits
• Voltage regulation in extreme temperature environments

Procurement Notes

Verify that the specific part number matches the required reliability level (JAN, JANTX, JANTXV, or JANS) as indicated in the nomenclature. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military specifications. Ensure the ordering suffix aligns with the desired tolerance and packaging configuration before finalizing procurement.

Selection Notes

Select this component when a robust, surface-mount Zener diode is required for critical voltage regulation tasks. The B-SQ MELF package provides a compact footprint suitable for space-constrained designs. Consider the thermal resistance characteristics and derating curves to ensure stable operation under varying ambient temperatures and load conditions.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of 0.5-watt Zener voltage regulators. The series covers a wide voltage range from 2.4V to 200V with standard 5% tolerances and tighter options. These components are industry-recognized replacements for axial-leaded equivalents, offering superior performance in harsh environments due to their hermetic sealing and radiation hardness.

Replacement Considerations

Direct substitutes include other parts within the 1N6309US-1N6355US series with matching voltage ratings. Verify equivalent thermal resistance and package dimensions when replacing with non-Microchip variants to maintain circuit board compatibility and thermal performance.