1N5227BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5227BUR-1 is a surface mount Zener voltage regulator with a nominal breakdown voltage of 3.6 V at a test current of 20 mA. It operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 0.5 W. The device features a maximum dynamic impedance of 24 Ohms, a reverse leakage current of 15 µA, and a temperature coefficient of -0.065 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed metallurgically bonded glass surface mount package
• Inherently radiation hard per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High reliability electronic systems requiring radiation hardness
• Applications necessitating minimal capacitance and ESD immunity

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm the required voltage tolerance level, as tighter tolerances are identified by different suffixes. Confirm RoHS compliance status, noting that compliant versions are available for commercial grade only. Ensure the ordering nomenclature matches the desired reliability screening level relative to MIL-PRF-19500.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount equivalent to the JEDEC registered axial-leaded series is required. Consider the -0.065 %/°C temperature coefficient for precision applications. Verify that the 0.5 W power dissipation rating aligns with the thermal design constraints of the target FR4 printed circuit board footprint.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which provides surface mount equivalents to the popular JEDEC registered 1N5221 to 1N5281 series. The series covers a voltage selection from 2.4 to 200 volts in a metallurgically bonded configuration.

Single Zener Diodes Replacement Considerations

The datasheet identifies the DO-35 (DO-204AH) axial-leaded variants, specifically the 1N5221B-1 thru 1N5281B-1 series, as alternative package options within the same product family.