1N6348US/TR

Overview

The Microchip Technology 1N6348US/TR is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a voidless hermetically sealed glass package with an internal metallurgical bond, ensuring robust construction. The device operates within a junction and storage temperature range of -65 to +175 °C and provides a nominal Zener voltage of 100 V at a test current of 1.3 mA. It exhibits a maximum dynamic impedance of 340 ohms and supports a maximum steady-state power dissipation of 0.5 W.

Feature Summary

• Hermetically sealed voidless hard glass package with tungsten slugs
• Internal Category I metallurgical bonds for enhanced reliability
• Qualified per MIL-PRF-19500/533 standards
• Non-sensitive to electrostatic discharge

Applications

• High-reliability voltage regulation circuits
• Military and aerospace electronic systems
• Radiation-hardened circuit designs
• Critical power management subsystems

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as the base part number covers multiple qualification tiers. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from military specifications. Ensure the tape and reel packaging meets EIA-481-B standards for surface mount assembly processes.

Selection Notes

Select this component when a 100 V Zener reference is needed in a surface mount MELF package. Consider the thermal resistance values for derating calculations based on end-cap or ambient temperature conditions. Evaluate the surge current capability and reverse leakage characteristics against the specific circuit requirements to ensure stable operation across the full operating temperature range.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of 0.5 W Zener voltage regulators. The series offers a wide selection of voltages from 2.4 to 200 volts with standard 5% tolerance and tighter options. These components serve as the surface mount equivalent of the JEDEC registered axial-leaded 1N6309 series, providing similar performance in a compact B-SQ MELF form factor.

Replacement Considerations

Direct replacements include other 1N6348 variants such as JANTX1N6348US or JANTXV1N6348US depending on the required reliability tier. Verify that any substitute maintains the same 100 V nominal voltage and 0.5 W power rating. Ensure the replacement package matches the MELF dimensions for proper PCB footprint compatibility.