1N3019BUR-1/TR

Overview

The Microchip Technology 1N3019BUR-1/TR is a surface mount Zener diode qualified per MIL-PRF-19500/115. It features a DO-213AB (MELF) package with a nominal Zener voltage of 9.1 V at a test current of 28 mA. The device offers a maximum Zener impedance of 6 Ohms and a maximum reverse leakage current of 25 µA. It supports a DC power dissipation of 1.0 W and operates within a junction temperature range of -55°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF construction for high-reliability applications
• Leadless surface mount design suitable for high-density mounting
• Metallurgically bonded internal contacts for enhanced reliability

Applications

• Voltage regulation in high-density electronic circuits
• High-reliability military and aerospace systems
• Applications requiring low parasitic characteristics

Procurement Notes

Verify the specific qualification level required, as the base part number may correspond to commercial grade while JAN, JANTX, or JANTXV prefixes denote military screening. Confirm RoHS compliance status if applicable, noting that certain finishes are available only on commercial grades. Ensure the tape and reel packaging matches standard EIA-481-1-A specifications for automated assembly processes.

Selection Notes

Select this component when a leadless surface mount equivalent to the JEDEC registered 1N3019B-1 is needed. The 5% voltage tolerance designation 'B' provides standard precision. Consider the thermal resistance and derating curves for power dissipation management above 125°C. Verify compatibility with the mounting surface coefficient of expansion to ensure mechanical integrity during thermal cycling.

Part Context

This device belongs to the 1N3016BUR-1 through 1N3045BUR-1 series of 1 Watt Surface Mount Zener Diodes. The series provides leadless surface mount equivalents to the traditional DO-13 package JEDEC registrations. The family covers a wide Zener voltage range from 6.8 volts to 110 volts, offering versatile options for various voltage regulation requirements in compact form factors.

Replacement Considerations

Direct replacements include the 1N3019B-1 in the DO-13 axial package for non-surface mount designs. Equivalent surface mount parts within the same series include other 1N30xxBUR-1 variants with adjusted voltage ratings. Cross-reference with MLL3019B e3 for RoHS-compliant commercial versions.