1N5226B

Single Zener Diodes Overview

The Microchip Technology 1N5226B is a silicon unidirectional Zener voltage regulator diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. It provides a nominal Zener voltage of 3.3 V with a standard tolerance of ±5% for the B suffix. The device operates at a maximum power dissipation of 0.5 W and features a test current of 20 mA. Electrical characteristics include a maximum reverse leakage current of 25 µA, a dynamic impedance of 28 Ω, and a forward voltage of 1.5 V. The component supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance suitable for high-frequency applications
• Inherently radiation hard per MicroNote 050 specifications
• Non-sensitive to electrostatic discharge (ESD)

Single Zener Diodes Applications

• Voltage stabilization circuits
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the 1N5226B designation is utilized by multiple vendors including Microsemi, Vishay, and others. Confirm RoHS compliance status and suffix requirements, such as 'e3' for lead-free plating or '-1' for internal bonds. Ensure the selected variant matches the required JEDEC registration and screening levels for your specific application environment.

Single Zener Diodes Selection Notes

Select this component when a precise 3.3 V reference is needed within a low-power, through-hole design. Consider the negative temperature coefficient typical for voltages below 5 V. Evaluate thermal derating curves if ambient temperatures exceed standard limits. Verify that the DO-35 package dimensions align with the PCB footprint constraints and that the 0.5 W power rating accommodates the expected load conditions.

Single Zener Diodes Part Context

This part belongs to the extensive 1N5221 through 1N5281B series of 0.5 W glass axial-leaded Zener diodes. The series covers a wide voltage selection from 2.4 V to 200 V. The 1N5226B specifically addresses the lower voltage end of the spectrum, utilizing avalanche breakdown mechanisms distinct from higher voltage Zener diodes in the same family.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available as MLL5226B in the DO-213AA MELF style package. DO-7 glass body axial-leaded equivalents may also serve as functional replacements depending on spatial constraints.