1N3029BUR-1/TR

Overview

The Microchip Technology 1N3029BUR-1/TR is a surface mount Zener diode qualified per MIL-PRF-19500/115. It features a hermetically sealed glass MELF package (DO-213AB) with a nominal Zener voltage of 24 V at a test current of 10.5 mA. The device offers a 5% voltage tolerance, a maximum reverse leakage current of 10 µA, and a dynamic impedance of 25 Ohms. It supports a DC power dissipation of 1 W and operates within a junction temperature range of -55 °C to +175 °C.

Feature Summary

• Hermetically sealed double plug glass construction for high reliability
• Metallurgically bonded internal contacts to reduce thermal resistance
• Leadless surface mount design suitable for high-density applications
• Qualified under JAN, JANTX, and JANTXV military standards

Applications

• Voltage regulation in high-reliability electronic circuits
• High-density surface mount assembly environments
• Applications requiring low parasitic characteristics

Procurement Notes

Verify the specific qualification level (JAN, JANTX, or JANTXV) required for your application against the ordering suffix. Confirm that the DO-213AB MELF package dimensions match your PCB footprint. Ensure the soldering profile adheres to the specified thermal limits to maintain the hermetic seal integrity during assembly.

Selection Notes

Select this component when a ruggedized, leadless Zener diode is needed for harsh environments. The 1W power rating and wide operating temperature range support demanding thermal conditions. Consider the 5% tolerance if tighter voltage precision is not critical, as lower tolerance options exist within the series.

Part Context

This part belongs to the 1N3016B-1 through 1N3045B-1 series of 1 Watt Surface Mount Zener Diodes. These devices serve as surface mount equivalents to JEDEC registered axial-leaded parts, providing similar electrical performance in a compact DO-213AB outline. The series covers a broad Zener voltage range from 6.8 V to 110 V.

Replacement Considerations

Direct replacements include other variants within the 1N3016BUR-1 to 1N3045BUR-1 series with matching voltage ratings. Axial equivalents like the 1N3029B-1 may be used if package changes are acceptable.