1N4905A

Single Zener Diodes Overview

The 1N4905A is a single Zener diode manufactured by Microchip Technology, housed in the DO-7 (DO-204AA) axial leaded package. It features a nominal Zener voltage of 12.8V and a maximum power dissipation of 400mW at ambient temperature. The component is designed for general-purpose voltage regulation and protection applications.

Single Zener Diodes Feature Summary

• Provides stable voltage reference through Zener breakdown mechanism
• Utilizes glass passivated junction for reliability
• Axial leaded construction facilitates through-hole mounting

Single Zener Diodes Applications

• Voltage regulation circuits
• Overvoltage protection
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify manufacturer authenticity as multiple vendors supply this part. Confirm RoHS compliance status, as standard versions may contain lead. Check specific suffixes like /TR for tape and reel packaging variations against bare tube requirements.

Single Zener Diodes Selection Notes

Select based on required 12.8V regulation point and 400mW thermal limit. Ensure PCB layout accommodates DO-7 axial leads. Consider derating power dissipation if operating above specified ambient temperatures to maintain junction safety.

Single Zener Diodes Part Context

This component belongs to the standard Zener diode family produced by Microchip Technology under the Microsemi brand heritage. It serves as a discrete semiconductor device for analog circuit design, distinct from integrated voltage regulators or transient suppression arrays.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify pinout compatibility and electrical tolerances before substituting with generic equivalents.