1N6350US

Overview

The Microchip Technology 1N6350US is a military-qualified Zener voltage regulator featuring a voidless hermetically sealed glass MELF package. It provides a nominal Zener voltage of 120 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W at an end cap temperature of 150°C. Key electrical parameters include a maximum reverse current of 91 µA at 25°C, a dynamic impedance of 600 Ω at the test current of 1.0 mA, and a surge current rating of 5.2 A.

Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability.
• Surface mount equivalent of JEDEC registered axial-leaded series in a compact MELF package.
• Inherently radiation hard and non-sensitive to electrostatic discharge (ESD).
• Available in JAN, JANTX, JANTXV, and JANS reliability levels per MIL-PRF-19500/533.

Applications

• High-reliability aerospace and defense circuits where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened electronic systems requiring robust surface-mount components.

Procurement Notes

Verify the specific reliability level required, as commercial versions differ from qualified JAN/JANS grades. Confirm RoHS compliance status if applicable, noting that compliant finishes are available on commercial grade only. Ensure the ordering suffix matches the desired voltage tolerance and termination finish specifications defined in the part nomenclature.

Selection Notes

Select this component for applications requiring a 120 V breakdown voltage in a surface-mount form factor. Consider the thermal resistance values when designing heat dissipation paths, as junction-to-end cap resistance varies by series subgroup. Verify that the operating current remains within the specified limits to maintain stable voltage regulation and prevent exceeding the maximum power dissipation rating.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of 0.5 W Zener diodes. The series offers voltage selections ranging from 2.4 V to 200 V with various tolerance options. These regulators utilize a B-SQ MELF package and are designed to replace traditional axial-leaded equivalents while providing superior mechanical robustness and hermetic sealing capabilities.

Replacement Considerations

Direct replacements include other 1N6350 variants with matching voltage and tolerance ratings. Cross-reference with 1N6350D for DO-35 axial-leaded equivalents if package changes are permissible. Ensure substitute parts meet the same MIL-PRF-19500/533 qualification standards if military-grade reliability is required.