1N3310RB

Overview

The Microchip Technology 1N3310RB 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 13.0 V at a test current of 960 mA and a maximum dynamic impedance of 1.10 Ohms. The device features reversed polarity, indicated by the 'R' suffix, connecting the cathode to the case. It operates within a junction temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) package.

Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring robust electrical connections
• Reversed polarity configuration with cathode connected to the case
• Inherently radiation hard characteristics suitable for harsh environments

Applications

• High power voltage regulation circuits
• Industrial control systems requiring rugged components
• Military and aerospace applications demanding radiation hardness

Procurement Notes

Verify the specific part number against official Microchip documentation to confirm the reversed polarity designation and tolerance class. Ensure that mounting hardware and thermal interface materials are compatible with the hexagonal stud configuration. Confirm environmental compliance status and screening levels if military qualifications are required for the intended application.

Selection Notes

Select this component when high power dissipation capabilities and radiation hardness are critical requirements. The reversed polarity option facilitates specific mounting configurations where the cathode must be electrically tied to the chassis or heat sink. Consider the thermal resistance and derating curves to ensure adequate heat sinking for continuous operation at rated power.

Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for broad voltage regulation ranges and are available in various military qualification levels including JAN, JANTX, and JANTXV. The series offers low thermal resistance and high surge capability for demanding power electronics applications.

Replacement Considerations

Consult factory for surface mount equivalents. Verify compatibility with existing thermal management solutions due to the stud mount requirement.