1N3320RA

Overview

The Microchip Technology 1N3320RA is a high-power 50 W Zener diode from the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 22 V at a test current of 570 mA. The device features a maximum dynamic impedance of 2.5 ohms and a maximum DC Zener current of 1,900 mA. It operates within a junction and storage temperature range of -65°C to +175°C. The 'A' suffix indicates a standard voltage tolerance of +/- 10%. This component utilizes internal solder bond construction for robust performance.

Feature Summary

• Hermetically sealed welded metal and glass construction
• Internal solder bond construction for reliability
• Reverse polarity configuration with cathode connected to case
• Radiation hard design inherent to the structure

Applications

• Voltage regulation in power supplies
• High power protection circuits
• Military and aerospace electronic systems

Procurement Notes

Verify the specific part number against official Microsemi datasheets to confirm the reverse polarity designation and tolerance class. Ensure that mounting hardware and thermal interface materials are compatible with the DO-5 package requirements. Confirm that the application environment supports the specified operating temperature range and power dissipation limits under actual load conditions.

Selection Notes

Select this component when a 50 W power rating and a 22 V regulation point are required. The reverse polarity option is suitable for designs where the case must serve as the cathode terminal. Consider the thermal resistance characteristics and ensure adequate heat sinking is available to maintain junction temperatures within safe operating limits during continuous operation.

Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for high-power applications requiring broad voltage selection. The series offers various tolerance options and military qualifications, providing engineers with flexible solutions for demanding voltage regulation tasks in rugged environments.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes with a 22 V nominal voltage and reverse polarity configuration. Verify mechanical compatibility with the DO-5 (DO-203AB) hexagonal stud package. Ensure electrical parameters such as dynamic impedance and test current align with the original circuit design requirements.