1N5249BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5249BUR-1 is a surface mount Zener voltage regulator with a nominal breakdown voltage of 19 V and a maximum power dissipation of 0.5 W. It utilizes a hermetically sealed DO-213AA (MELF) package featuring an internal metallurgical bond. The device provides a 5% voltage tolerance, a maximum reverse leakage current of 0.1 µA at 14 V, and a dynamic impedance of 23 Ω at the test current of 6.6 mA. Operating temperatures range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bond for environmental stability.
• Surface mount equivalent to JEDEC registered axial-leaded series.
• Inherently radiation hard per Microsemi specifications.
• Non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges.
• Data acquisition and control systems in spacecraft avionics.
• General purpose voltage reference applications.

Single Zener Diodes Procurement Notes

Verify component authenticity through authorized channels due to historical manufacturing transitions between Microsemi and Microchip. Confirm RoHS compliance status as commercial versions are available while military screening options exist. Ensure proper handling procedures are followed during assembly despite the robust metallurgical bond construction.

Single Zener Diodes Selection Notes

Select this component when a ruggedized surface mount solution is required for space or high-reliability environments. The DO-213AA package offers a direct footprint replacement for traditional axial leads. Verify that the 19 V breakdown voltage aligns with circuit requirements and that the 0.5 W power rating accommodates thermal derating curves under expected ambient conditions.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 W Zener diodes originally manufactured by Microsemi Corporation. Following corporate acquisitions, these products are now managed within the Microchip Technology portfolio. The series maintains specific MIL-PRF-19500 screening availability alongside standard commercial grade offerings.

Single Zener Diodes Replacement Considerations

Direct parameter-equivalent replacements include the 1N5249B in the DO-35 axial leaded package. Surface mount equivalents may require verification of pinout compatibility and thermal resistance characteristics against the original design constraints.

Single Zener Diodes FAQ

What is the maximum reverse leakage current specified for the 1N5249BUR-1?

The maximum reverse leakage current is 0.1 µA measured at a reverse voltage of 14 V.

Is the 1N5249BUR-1 sensitive to electrostatic discharge?

No, the device is non-sensitive to ESD according to MIL-STD-750 method 1020.