1N5256BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5256BUR-1 is a 0.5 W Zener voltage regulator in a DO-213AA (SOD80/MLL34) surface mount package. It provides a nominal Zener voltage of 30 V with a 5% tolerance at a test current of 4.2 mA. The device features a maximum reverse leakage current of 0.1 µA and a dynamic impedance of 49 Ohms. Operating temperatures range from -65°C to +175°C, with a positive temperature coefficient of +0.091 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount package with internal metallurgical bond
• Surface mount equivalent of JEDEC registered 1N5221 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
• Reference voltage sources for electronic circuits
• Protection against voltage transients

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm voltage tolerance and RoHS compliance status. Ensure the ordering suffix matches the required reliability level, as commercial versions differ from screened options. Confirm package dimensions align with the target PCB footprint before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. The DO-213AA package offers a direct replacement for axial-leaded equivalents while maintaining low capacitance characteristics. Consider the positive temperature coefficient for thermal stability requirements within the specified operating range.

Single Zener Diodes Part Context

This component belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener voltage regulators. The series covers a voltage range from 2.4 V to 200 V in a metallurgically bonded configuration. It serves as a surface mount alternative to the popular JEDEC registered 1N5221 to 1N5281 axial series.

Single Zener Diodes Replacement Considerations

The 1N5256B-1 is available as an axial-leaded equivalent in the DO-35 package.