1N3339RB

Single Zener Diodes Overview

The Microchip Technology 1N3339RB 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 82 V at a test current of 150 mA. The device features a maximum dynamic impedance of 11 Ohms and a maximum reverse current of 10 µA. It operates within a junction temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) package with an R suffix indicating reversed polarity (cathode to case).

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability.
• Internal solder bond design ensures robust electrical connections.
• Inherently radiation hard per Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020.

Single Zener Diodes Applications

• Voltage regulation in power supplies requiring broad operating ranges.
• High-power protection circuits utilizing adequate heat sinking.
• Military and aerospace systems requiring radiation hardness.

Single Zener Diodes Procurement Notes

Verify the specific part number against official Microchip documentation to confirm the 'R' suffix denotes reversed polarity (cathode to case) and the 'B' suffix indicates a 5% tolerance. Ensure mounting hardware matches the 11/16 inch hexagonal stud with 1/4-28 threads specified in the datasheet. Confirm thermal management requirements align with the 50 W dissipation rating at a case temperature below 75°C.

Single Zener Diodes Selection Notes

Select this component when a high-power 50 W Zener diode with a nominal 82 V breakdown is required. The reversed polarity configuration suits applications where the cathode must connect to the heatsink or case. Verify that the system can accommodate the DO-5 stud mount package and provide sufficient thermal resistance to maintain junction temperatures within the specified -65°C to +175°C range during operation.

Single Zener Diodes Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 thru 1N3350B series, which offers a broad selection of voltages from 3.9 V to 200 V. These diodes are designed for high-power applications up to 50 W with low thermal resistance. The series also includes military qualifications such as JAN, JANTX, and JANTXV, providing options for different screening levels and reliability requirements in demanding environments.

Single Zener Diodes Replacement Considerations

Consult the manufacturer for surface mount equivalents if board space constraints require alternative packaging. Verify compatibility with existing thermal management solutions due to the 50 W power dissipation capability and stud mount mechanical interface.