1N3332A

Overview

The Microchip Technology 1N3332A 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 36.0 V at a test current (IZT) of 350 mA. The device features a maximum dynamic impedance (ZZT) of 3.50 Ohms and a maximum DC Zener current (IZM) of 1,150 mA. 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.

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; reverse polarity available via suffix

Applications

• Voltage regulation in power supplies requiring broad operating current ranges
• High-power protection circuits utilizing low thermal resistance mounting
• Military and aerospace systems requiring JAN, JANTX, or JANTXV qualifications

Procurement Notes

Verify the specific tolerance suffix required for your design, as standard B suffix denotes +/- 5% while A indicates +/- 10%. Confirm polarity requirements, noting that standard units have anode-to-case connection and reverse polarity requires an R suffix. Ensure adequate heat sinking is planned, as the 50 W rating depends on maintaining the case temperature below 75°C to avoid power derating.

Selection Notes

Select this component when a robust, hermetically sealed 50 W Zener diode is needed for high-reliability applications. The DO-5 package allows for stud mounting to maximize heat dissipation. Consider the +/- 5% tolerance of the B suffix for precise regulation needs. Verify that the system can accommodate the physical dimensions and weight of the hexagonal stud package.

Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener Diodes. These devices are designed for high-power voltage regulation tasks where durability and wide temperature operation are critical. The series covers a broad voltage range from 3.9 V to 200 V, offering flexibility for various industrial and military power supply designs.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with matching 36 V specifications. Check for compatible military qualifications such as JAN or JANTX if environmental ruggedness is required. Ensure any substitute maintains the same thermal resistance and stud mounting configuration.