1N3021BUR-1/TR

Overview

The Microchip Technology 1N3021BUR-1/TR is a surface mount glass Zener diode in the DO-213AB (MELF) outline. It provides an 11 V nominal Zener voltage with a ±5% tolerance, tested at 23 mA. The device dissipates up to 1.5 W and operates from -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 1.0 µA at 8.4 V, a typical temperature coefficient of 0.060 %/°C, and a maximum Zener impedance of 8 Ω at the test current.

Feature Summary

• Hermetically sealed double-slug glass construction for high reliability
• Metallurgically enhanced internal contact design for lower thermal resistance
• Leadless surface mount package suitable for high-density mounting
• Inherently radiation hard

Applications

• High-reliability applications requiring low parasitic requirements
• Voltage regulation over broad operating current and temperature ranges
• High-density circuit board mounting

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging configuration. The TR suffix indicates tape and reel packaging per EIA-481-1-A standards. Confirm RoHS compliance status by checking for the e3 suffix if required. Ensure the requested screening level matches the prefix requirements for military specifications such as JAN or JANTX variants.

Selection Notes

Select this component when a leadless surface mount Zener diode with hermetic sealing is required. The DO-213AB package offers higher power ratings compared to standard axial equivalents. Consider the metallurgically enhanced contacts for improved reliability and thermal performance. Verify that the 11 V breakdown voltage aligns with the circuit's regulation needs within the specified temperature range.

Part Context

This part belongs to the 1N3016BUR-1 through 1N3051BUR-1 series of surface mountable Zener diodes. The series serves as a surface mount equivalent to JEDEC registered 1N3016 through 1N3051 devices in the DO-13 package. The manufacturer notes that these devices are also identified by the MLL3016B through MLL3051B nomenclature.

Replacement Considerations

Equivalent axial lead versions are available as 1N3016B through 1N3051B. Devices with MQ, MX, or MV prefixes offer screening options equivalent to JAN, JANTX, or JANTXV levels respectively.