1N3031BUR-1/TR

Overview

The Microchip Technology 1N3031BUR-1/TR is a surface mount Zener diode in the DO-213AB (MELF) package. It features a nominal Zener voltage of 30 V at a test current of 8.5 mA, with a maximum dynamic impedance of 40 Ohms and a maximum reverse leakage current of 10 µA. The device supports a DC power dissipation of 1 W and operates within a junction temperature range of -55 °C to +175 °C. It utilizes hermetically sealed glass construction for high reliability.

Feature Summary

• Hermetically sealed double plug glass construction with metallurgically bonded internal contacts
• Leadless surface mount MELF package suitable for high-density applications
• Inherently radiation hard design

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic systems requiring low parasitic characteristics
• Radiation-hardened circuit designs

Procurement Notes

Verify that the specific ordering suffix matches the required tape and reel configuration, as standard packaging may differ from bulk options. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions are available in compliant finishes while military grades may not be. Ensure the requested quantity aligns with factory minimum order requirements for reel-based shipments.

Selection Notes

Select this component when a leadless surface mount equivalent to the JEDEC registered 1N3031B-1 is required. The DO-213AB outline provides lower thermal resistance compared to traditional axial packages. Consider the 30 V nominal breakdown voltage and 1 W power rating against the specific load conditions and ambient temperature constraints of the target application.

Part Context

This part belongs to the 1N3016BUR-1 through 1N3045BUR-1 series of 1 Watt Surface Mount Zener Diodes. The series offers a wide selection of voltages ranging from 6.8 V to 110 V. These devices serve as direct surface mount replacements for older JEDEC registered axial components, maintaining similar electrical performance in a compact form factor.

Replacement Considerations

Direct leadless surface mount equivalents exist for the JEDEC registered 1N3016 through 1N3045 number series. Verify pinout polarity and physical dimensions against existing board layouts before substitution.