1N3018BUR-1/TR

Overview

The Microchip Technology 1N3018BUR-1/TR is a surface mount Zener diode in the DO-213AB (MELF) package. It provides an 8.2 V nominal Zener voltage with a 5% tolerance at a test current of 31 mA. The device features a maximum reverse leakage current of 50 µA and a dynamic impedance of 4.5 Ohms. It operates within a temperature range of -55°C to +175°C, dissipating up to 1 W of power.

Feature Summary

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

Applications

• Voltage regulation over broad operating currents
• High-reliability military and aerospace circuits
• Low parasitic requirement designs

Procurement Notes

Verify the specific suffix configuration against the datasheet nomenclature. Confirm that the TR designation indicates tape and reel packaging. Ensure the JAN, JANTX, or JANTXV qualification level matches the project requirements. Check RoHS compliance status if applicable to the commercial grade version.

Selection Notes

Select this component when a leadless surface mount equivalent to the JEDEC registered 1N3018B-1 is required. Consider the DO-213AB outline for low parasitic needs. Evaluate the 8.2 V breakdown characteristic against circuit voltage requirements. Verify thermal derating curves for operation above 125°C.

Part Context

This part belongs to the 1N3016BUR-1 through 1N3045BUR-1 series. These devices are qualified per MIL-PRF-19500/115. They serve as surface mount replacements for axial-leaded counterparts. The series covers a wide Zener voltage range from 6.8 V to 110 V.

Replacement Considerations

Direct replacement for 1N3018B-1 in DO-13 packages requires adapter consideration. Verify footprint compatibility with DO-213AB pads. Check polarity marking alignment on the MELF body.