1N6355US/TR

Overview

The Microchip Technology 1N6355US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It provides a nominal Zener voltage of 200 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a steady-state power dissipation rating of 0.5 W at an end cap temperature of 150°C. Electrical characteristics include a maximum reverse current of 80 µA at 25°C and 152 mA maximum Zener current.

Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Military qualification available per MIL-PRF-19500/533 standards.
• Inherently radiation hard and non-sensitive to electrostatic discharge.
• Surface mount equivalent of the JEDEC registered 1N6309 through 1N6355 series.

Applications

• High-reliability applications where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened circuit designs.

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as the base part number covers multiple qualification tiers. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are commercial grade only. Ensure the tape and reel packaging aligns with automated assembly requirements.

Selection Notes

Select this component when a robust, hermetically sealed surface-mount Zener diode is needed for high-voltage regulation up to 200 V. Consider the thermal resistance values for derating calculations based on whether the design utilizes end cap or ambient cooling. Verify that the 0.5 W power dissipation rating meets the thermal constraints of the target PCB layout.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of voidless hermetically sealed glass Zener diodes. The series offers selections from 2.4 to 200 volts with various tolerance options. It serves as the surface-mount counterpart to the axial-leaded DO-35 packages, maintaining identical electrical performance in a compact form factor suitable for dense mounting.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.