1N6350US/TR

Overview

The Microchip Technology 1N6350US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It features a nominal Zener voltage of 120 V with a standard tolerance of ±5%. The device operates at a maximum steady-state power dissipation of 0.5 W and supports a maximum Zener current of 3.5 mA. Electrical characteristics include a dynamic impedance of 3,200 ohms at the test current and a reverse leakage current of 80 µA at 150 °C. The component is qualified per MIL-PRF-19500/533 and offers an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Surface mount equivalent of the JEDEC registered 1N6309 through 1N6355 series.
• Inherently radiation hard and non-sensitive to electrostatic discharge.
• Available in multiple military reliability levels including JAN, JANTX, JANTXV, and JANS.

Applications

• High-reliability applications where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Military and aerospace electronic systems requiring robust construction.

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as the base part number covers multiple qualification grades. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are available on commercial grade only. Ensure the tape and reel packaging matches EIA-481-B standards during integration.

Selection Notes

Select this component when a hermetically sealed surface-mount Zener diode is needed for critical circuits. The 1N6350US provides a precise 120 V reference point within the 2.4 V to 200 V selection range. Consider the thermal resistance values for derating calculations based on whether the design utilizes junction-to-end cap or junction-to-ambient cooling paths.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener voltage regulators. The series includes both axial-leaded packages and the B-SQ MELF surface-mount variant. These industry-recognized components utilize voidless-glass construction and are designed for environments demanding extreme durability and stable voltage regulation.

Replacement Considerations

Direct replacements must match the 120 V nominal voltage, 0.5 W power rating, and B-SQ MELF package dimensions. Verify that any substitute component meets the same MIL-PRF-19500/533 qualification requirements and maintains compatible thermal and electrical performance specifications.