1N3021BUR-1

Overview

The Microchip Technology 1N3021BUR-1 is a surface mount Zener diode with a nominal voltage of 11 V and a 5% tolerance. It operates within a temperature range of -55 °C to +175 °C and dissipates up to 1 W. Key electrical parameters include a maximum reverse leakage current of 10 µA, a dynamic impedance of 8 Ohms at the test current of 23 mA, and a forward voltage of 1.2 V. The device features a DO-213AB MELF package.

Feature Summary

• Hermetically sealed glass construction with metallurgically bonded internal contacts for high reliability.
• Leadless surface mount design suitable for high-density applications with low parasitic requirements.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Applications

• Voltage regulation over broad operating current and temperature ranges.
• High-reliability military and aerospace electronic systems.
• High-density circuit board designs requiring low profile components.

Procurement Notes

Verify that the specific part number matches the required military qualification level (JAN, JANTX, or JANTXV) as indicated in the nomenclature. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from qualified levels. Ensure the ordering suffix aligns with the desired voltage tolerance and termination finish specifications.

Selection Notes

Select this component when a hermetically sealed, leadless surface mount Zener diode is required for high-reliability environments. The 11 V nominal voltage and 5% tolerance suit precise regulation needs. Consider the thermal resistance and power derating characteristics for operation near the upper temperature limit of 175 °C.

Part Context

This device belongs to the 1N3016BUR-1 through 1N3045BUR-1 series of 1 Watt Surface Mount Zener Diodes. It serves as a surface mount equivalent to the JEDEC registered 1N3016B-1 through 1N3045B-1 series in the DO-13 package, adapted for the DO-213AB outline.

Replacement Considerations

Direct replacements include other members of the 1N30xxBUR-1 series with matching voltage ratings. Verify package compatibility with the DO-213AB MELF form factor and ensure thermal and electrical parameters meet system requirements.