1N5227B

Single Zener Diodes Overview

The Microchip Technology 1N5227B is a 0.5 W glass axial-lead Zener diode housed in a DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 3.6 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 15 µA at 1 V. Key electrical parameters include a Zener impedance of 24 Ω at a test current of 20 mA and a forward voltage of 1.5 V at 200 mA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Constructed with a hermetically sealed glass axial-lead package
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as the component was originally produced by Microsemi Scottsdale Division. Confirm RoHS compliance status, as standard B-suffix parts may not be compliant unless specified with an e3 suffix. Ensure the package type matches the required DO-35 axial lead configuration for your specific PCB layout needs.

Single Zener Diodes Selection Notes

Select this component when a precise 3.6 V regulation point is required with tight ±5% tolerance. Consider the low Zener impedance of 24 Ω for improved dynamic performance compared to higher impedance alternatives. Verify that the 0.5 W power dissipation rating aligns with the thermal management capabilities of the target application environment.

Single Zener Diodes Part Context

This part belongs to the popular 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 V to 200 V. The 1N5227B specifically addresses the lower voltage end of the spectrum, utilizing a glass body construction typical for this family of axial-leaded components.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include 1N5226B (3.3 V) and 1N5228B (3.9 V). For RoHS-compliant versions, consider the 1N5227Be3 variant. Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package.