1N3323RB

Single Zener Diodes Overview

The Microchip Technology 1N3323RB is a high-power 50 W Zener diode from the 1N3305-1N3350B series. It provides voltage regulation with a nominal Zener voltage of 27 V at a test current of 460 mA. The device features a maximum dynamic impedance of 2.8 ohms and a typical temperature coefficient of 0.085 %/°C. It utilizes a DO-5 (DO-203AB) hermetically sealed metal and glass case with reverse polarity, where the cathode connects to the hexagonal stud.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction for durability
• Internal solder bond design
• Reverse polarity configuration with cathode to case
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage regulation in power supplies
• High power protection circuits
• Military and aerospace systems requiring MIL-PRF-19500/358 qualification

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the 'R' suffix to confirm the reversed polarity configuration where the cathode is connected to the case. Ensure the procurement documentation references the correct JEDEC registration and tolerance class associated with the 'B' suffix. Confirm thermal management requirements align with the specified derating curves for operation above 75°C case temperature.

Single Zener Diodes Selection Notes

Select this component when a 50 W power dissipation capability is required within a ruggedized, hermetically sealed package. The reverse polarity option facilitates mounting configurations where the cathode must be electrically tied to the chassis or heat sink. Verify that the operating junction temperature remains within the -65°C to +175°C range during application.

Single Zener Diodes Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for applications demanding high power handling and reliability. The series offers a broad selection of voltages ranging from 3.9 V to 200 V, supporting various industrial and defense electronics designs.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with matching 27 V nominal voltage and reverse polarity. Verify that any substitute meets the same MIL-PRF-19500/358 military qualification standards if required by the system specification.