1N3329RB

Single Zener Diodes Overview

The Microchip Technology 1N3329RB is a high-power 50 W Zener diode from the 1N3305-1N3350B series. It provides voltage regulation with a nominal Zener voltage of 45.0 V at a test current of 280 mA. The device features a maximum dynamic impedance of 4.50 ohms and supports a maximum DC Zener current of 930 mA. It operates within a junction temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) package with an internal solder bond construction.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Reverse polarity configuration with cathode connected to the case
• Internal solder bond construction for robust mechanical integrity
• Inherently radiation hard design suitable for harsh environments

Single Zener Diodes Applications

• High power voltage regulation circuits
• Harsh environment electronic systems requiring radiation hardness
• Military and aerospace applications utilizing MIL-PRF-19500/358 qualifications

Single Zener Diodes Procurement Notes

Verify the specific revision status of the datasheet against the manufacturer's official website, as documentation may be updated. Confirm that the reverse polarity suffix 'R' matches the required circuit topology, as standard units feature an anode-to-case connection. Ensure mounting hardware accommodates the hexagonal stud dimensions specified in the mechanical data sheet.

Single Zener Diodes Selection Notes

Select this component when a 45 V regulation point is required with high power dissipation capabilities up to 50 W. The reverse polarity option is critical for designs where the case must serve as the cathode terminal. Consider the thermal resistance of 2.0°C/W maximum when designing heat sinking solutions to maintain junction temperatures within the specified operating limits.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. These devices are JEDEC registered and offer a broad voltage selection range from 3.9 V to 200 V. The series is designed for high-reliability applications, often available in military qualifications such as JAN, JANTX, and JANTXV.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N3329B for standard polarity or other 1N33xx series variants for different voltage ratings. Verify compatibility with MIL-PRF-19500/358 specifications if military screening is required.