1N3329A

Single Zener Diodes Overview

The Microchip Technology 1N3329A 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 45.0 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
• Internal solder bond design ensuring robust electrical connections
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard characteristics suitable for harsh environments

Single Zener Diodes Applications

• Voltage regulation in power supplies requiring high power dissipation
• Protection circuits in aerospace and military systems
• Industrial control applications involving high thermal loads

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements, as the 'A' designation indicates a standard tolerance level distinct from other variants. Confirm that the required polarity matches the standard anode-to-case configuration unless an 'R' suffix is specified. Ensure mounting hardware accommodates the hexagonal stud dimensions and thread specifications defined in the mechanical data sheet.

Single Zener Diodes Selection Notes

Select this component when a 45 V regulation point is required with significant power handling capabilities. The DO-5 package allows for direct stud mounting to heat sinks, facilitating efficient thermal management up to 50 watts. Consider the positive temperature coefficient for stability in varying thermal conditions compared to lower voltage alternatives.

Single Zener Diodes Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for high-reliability applications and are also available in JAN, JANTX, and JANTXV military qualifications. The series covers a broad voltage range from 3.9 V to 200 V, offering versatile options for high-power voltage regulation needs.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N4549B through 1N4556B series which share identical electrical and mechanical specifications. Military qualified versions such as JAN1N3329A or JANTX1N3329A provide enhanced screening but maintain functional compatibility.