1N3032BUR-1

Overview

The Microchip Technology 1N3032BUR-1 is a surface mount Zener diode with a nominal voltage of 33 V. It operates within a temperature range of -55 °C to +175 °C and dissipates up to 1 W. The device features a maximum reverse leakage current of 10 µA at the specified voltage, a dynamic impedance of 45 Ohms at the test current, and a positive temperature coefficient of 0.099 %/°C. It utilizes a DO-213AB (MELF) package.

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 in high-reliability circuits
• High-density electronic assemblies requiring low parasitic components
• Military and aerospace systems utilizing JAN, JANTX, or JANTXV qualifications

Procurement Notes

Verify the specific military qualification level required for the application, as the part number suffix indicates tolerance but not necessarily the reliability grade. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from qualified levels. Ensure the ordering suffix matches the desired voltage tolerance and packaging configuration before finalizing procurement.

Selection Notes

Select this component when a 33 V reference is needed in a leadless surface mount package. Consider the positive temperature coefficient for thermal stability requirements. Evaluate the 1 W power dissipation limit against the operating environment's thermal resistance. Verify compatibility with the mounting surface system's coefficient of expansion to prevent mechanical stress during operation.

Part Context

This device belongs to the 1N3016BUR-1 through 1N3045BUR-1 series of 1 Watt Surface Mount Zener Diodes. The series provides leadless equivalents to JEDEC registered axial-leaded parts, offering hermetic sealing and metallurgical bonding. It is designed for applications demanding high density and radiation hardness, available in various military qualification levels.

Replacement Considerations

Direct replacements include other 1N3032 variants in the same series with matching voltage and package specifications. Cross-reference with standard 1N3032B axial parts only if the circuit layout accommodates through-hole mounting and hermetic sealing is not critical.