1N6353US

Overview

The Microchip Technology 1N6353US is a surface-mount Zener voltage regulator with a nominal breakdown voltage of 160 V and a maximum power dissipation of 500 mW. It features a standard 5% voltage tolerance and operates within a junction temperature range of -65°C to +175°C. The device utilizes a B-SQ MELF glass package with internal metallurgical bonds, providing hermetic sealing for high-reliability environments.

Feature Summary

• Hermetically sealed voidless-glass construction using internal metallurgical bonding
• Military qualification per MIL-PRF-19500/533 standards
• Robust design inherently resistant to electrostatic discharge (ESD)
• Radiation-hardened characteristics suitable for harsh environments

Applications

• High-reliability aerospace systems
• Military-grade electronic circuits
• Harsh environment voltage regulation
• Critical infrastructure protection

Procurement Notes

Verify the specific reliability level required, as commercial versions may differ from military specifications. Confirm RoHS compliance status if applicable, noting that compliant finishes are available only on commercial grade devices. Ensure the ordering suffix matches the desired tolerance and bond category before finalizing procurement.

Selection Notes

Select this component when a robust, radiation-tolerant Zener diode is needed for high-voltage regulation in extreme temperatures. The 160 V rating fits within the series' broad selection range. Consider the thermal resistance derating curves for PCB layout planning to ensure safe operation under steady-state conditions.

Part Context

This part belongs to the 1N6309US through 1N6355DUS series of 0.5 W glass Zener diodes. The series offers voltages from 2.4 V to 200 V with various tolerance options. The US suffix indicates the B-SQ MELF surface-mount package, serving as the equivalent to the axial-leaded JEDEC registered counterparts.

Replacement Considerations

Direct replacements include other parts within the 1N6309US–1N6355US series or their axial-leaded equivalents like the 1N6353D. Verify that substitute components match the required MIL-PRF-19500/533 qualification level and metallurgical bond category.