1N5255BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5255BUR-1 is a surface mount Zener voltage regulator housed in a DO-213AA (MELF) package. It provides a nominal Zener voltage of 28 V with a 5% tolerance at a test current of 4.5 mA. The device features a maximum power dissipation of 0.5 W and operates within a junction temperature range of -65°C to +175°C. Electrical characteristics include a maximum dynamic impedance of 44 Ohms, a reverse leakage current of 0.1 µA, and a positive temperature coefficient of +0.091 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed metallurgically bonded glass surface mount package
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High reliability electronic circuits requiring radiation hardness
• Surface mount equivalents for axial-leaded JEDEC registered series

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's nomenclature guide to confirm tolerance levels and RoHS compliance status. Ensure that the procurement documentation explicitly references the MIL-PRF-19500 screening requirements if up-screening is required for the intended application environment.

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 serves as a direct surface mount equivalent to the traditional axial-leaded 1N5255B. Consider the positive temperature coefficient and low capacitance characteristics for precision regulation needs.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener voltage regulators. The series offers a wide selection of voltages from 2.4 to 200 volts in a metallurgically bonded configuration. It is designed to replace popular JEDEC registered axial-leaded series while providing surface mount convenience.

Single Zener Diodes Replacement Considerations

The 1N5255B is the standard axial-leaded equivalent. Verify pinout compatibility and thermal derating curves when transitioning between package types.