1N3322RA

Single Zener Diodes Overview

The Microchip Technology 1N3322RA is a high-power 50 W Zener diode from the 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 24.0 V at a test current (IZT) of 520 mA. The device features a maximum dynamic impedance (ZZT) of 2.60 ohms and a typical temperature coefficient of +0.080 %/°C. It operates within a junction and storage temperature range of -65°C to +175°C, dissipating up to 50 watts at a case temperature below 75°C.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction with internal solder bond for reliability
• Reverse polarity configuration with cathode connected to the case
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge (ESD)

Single Zener Diodes Applications

• High power voltage regulation in aerospace systems
• Military electronic circuit protection
• Industrial equipment requiring robust thermal performance

Single Zener Diodes Procurement Notes

Verify the specific suffix 'R' confirms reversed polarity (cathode to case) as standard units have anode to case. Confirm the 'A' suffix indicates a +/-10% tolerance on the Zener voltage. Ensure the procurement documentation references the correct JEDEC registration number and that the component meets the required MIL-PRF-19500/358 qualification level if specified for military use.

Single Zener Diodes Selection Notes

Select this component when a 24 V regulation point is required with high power handling capabilities. The reverse polarity option simplifies mounting where the case must serve as the electrical connection. Consider the thermal resistance of 2.0 °C/W maximum and the need for adequate heat sinking to maintain operation above 75°C case temperature without derating.

Single Zener Diodes Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices are designed for applications demanding high power dissipation and wide voltage ranges from 3.9 V to 200 V. The series utilizes a DO-5 (DO-203AB) package with a hexagonal stud for efficient thermal transfer and mechanical stability.

Single Zener Diodes Replacement Considerations

Consult factory for surface mount equivalents or other voltage variants within the 1N3305-1N3350B series. Verify compatibility with existing mounting hardware, specifically the 11/16 inch hexagonal stud with 1/4-28 threads.