1N3329B

Single Zener Diodes Overview

The Microchip Technology 1N3329B 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 45 V at a test current of 280 mA. The device features a maximum dynamic impedance of 4.5 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) hermetically sealed metal and glass case.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction with internal solder bond for reliability
• Inherently radiation hard design suitable for harsh environments
• ESD nonsensitive per MIL-STD-750 Method 1020
• Standard polarity connects anode to case

Single Zener Diodes Applications

• High power voltage regulation
• Military and aerospace electronic systems
• Harsh environment circuit protection

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against official documentation, as prefixes like JAN or JANTXV indicate distinct military screening levels under MIL-PRF-19500/358. Confirm thermal management requirements, as the 50 W rating applies only when the case temperature remains below 75°C. Ensure the correct polarity configuration is selected, noting that standard units have the anode connected to the case.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust 50 W power dissipation in a stud-mount package. The 1N3329B offers a 45 V regulation point with tight tolerance options available via suffixes. Consider the low thermal resistance of 2.0°C/W maximum for efficient heat transfer. Verify compatibility with existing mounting hardware, as the unit requires a hexagonal base with 1/4-28 threads.

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 broad voltage regulation ranges from 3.9 V to 200 V. The series is also available in JAN, JANTX, and JANTXV qualifications to meet specific military screening standards.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N4549B through 1N4556B series variants which share identical electrical characteristics and mechanical specifications.