1N3306B

Overview

The Microchip Technology 1N3306B 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 7.5 V at a test current of 1,700 mA. The device features a maximum dynamic impedance of 0.30 ohms and a maximum reverse current of 125 µA at its rated voltage. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 50 watts when mounted on a heat sink maintained below 75°C.

Feature Summary

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

Applications

• High power voltage regulation in industrial systems
• Overvoltage protection circuits requiring robust thermal handling
• Military and aerospace applications utilizing JAN or JANTX qualifications

Procurement Notes

Verify the specific suffix requirements for tolerance and polarity before ordering. Confirm that the application includes adequate mounting hardware and heat sinking to maintain the stud temperature below 75°C for full 50 W dissipation. Check for availability of military-grade variants if environmental screening is required.

Selection Notes

Select this component for applications demanding high power dissipation capabilities in a stud-mounted package. Ensure the circuit design accounts for the forward voltage drop and thermal resistance characteristics. Consider the reverse polarity option if the cathode-to-case connection is necessary for the system layout.

Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 W Zener diodes. These devices are designed for broad voltage regulation ranges and are available in various military qualification levels including JAN, JANTX, and JANTXV to meet stringent screening standards.

Replacement Considerations

Equivalent parts include the 1N4554B from the parallel 1N4549B through 1N4556B series.