1N3322B

Single Zener Diodes Overview

The Microchip Technology 1N3322B 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 27.0 V at a test current of 460 mA. The device features a maximum dynamic impedance of 2.80 Ohms and a typical temperature coefficient of 0.085 %/°C. It operates within a junction and storage temperature range of -65°C to +175°C, dissipating up to 50 watts at a case temperature below 75°C.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring structural integrity
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard per Microsemi MicroNote 050

Single Zener Diodes Applications

• High power voltage regulation in aerospace systems
• Defense electronics requiring military qualification
• Industrial equipment operating under extreme temperatures
• Power supply circuits demanding robust thermal performance

Single Zener Diodes Procurement Notes

Verify the specific manufacturing origin and lot traceability before procurement. Confirm that the component meets the required MIL-PRF-19500/358 screening levels if military qualification is necessary. Ensure proper mounting hardware is selected to maintain the specified thermal resistance and mechanical stability during operation.

Single Zener Diodes Selection Notes

Select this component when applications require high power dissipation capabilities combined with strict environmental resilience. The DO-5 package allows for direct stud mounting to heat sinks. Consider the positive temperature coefficient above 5.6 V for stable operation in varying thermal conditions without complex compensation networks.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. These devices are designed for rugged environments where standard small-signal diodes would fail due to thermal or mechanical stress. The series covers a broad voltage range from 3.9 V to 200 V.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with matching 27 V specifications. Verify that any substitute maintains the same hermetic sealing and internal solder bond construction to ensure comparable reliability in harsh environments.

Single Zener Diodes FAQ

What is the standard polarity configuration for the 1N3322B?

The standard polarity connects the anode to the case. Reverse polarity, connecting the cathode to the case, is available by adding an 'R' suffix to the part number.

How does the 1N3322B handle radiation exposure?

The device is inherently radiation hard as described in Microsemi MicroNote 050, making it suitable for space and defense applications.