1N3033BUR-1

Overview

The Microchip Technology 1N3033BUR-1 is a surface mount Zener diode in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 36 V at a test current of 7 mA, with a maximum dynamic impedance of 50 Ohms and a reverse leakage current of 10 µA. The device dissipates 1 W of power and operates within a temperature range of -55 °C to +175 °C.

Feature Summary

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

Applications

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

Procurement Notes

Verify that the specific part number matches the required qualification level, as this series is available in JAN, JANTX, and JANTXV variants per MIL-PRF-19500/115. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from qualified levels. Ensure the ordering suffix aligns with the desired tolerance and packaging configuration.

Selection Notes

Select this component when a leadless surface mount equivalent to the JEDEC registered 1N3033B-1 is required. The DO-213AB package offers lower thermal resistance compared to axial leads. Verify that the 36 V breakdown voltage and 1 W power dissipation meet the circuit's specific load and thermal management requirements.

Part Context

This device belongs to the 1N3016BUR-1 through 1N3045BUR-1 series of 1 Watt Surface Mount Zener Diodes. These components serve as direct surface mount replacements for traditional axial-leaded equivalents, maintaining similar electrical characteristics while adapting to modern PCB assembly techniques requiring compact footprints.

Replacement Considerations

Direct replacement for 1N3033B-1 in DO-41 packages requires accounting for the change to the DO-213AB outline. Ensure board layout accommodates the MELF dimensions.