1N3306A

Overview

The Microchip Technology 1N3306A 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 and a maximum dynamic impedance of 0.30 Ohms. The device features an internal solder bond construction within a hermetically sealed DO-5 (DO-203AB) metal and glass case. Standard polarity connects the anode to the hexagonal stud base.

Feature Summary

• Hermetically sealed welded construction with internal solder bond
• Low thermal resistance for high power dissipation up to 50 watts
• Broad operating voltage range across the series
• Radiation hard design

Applications

• High power voltage regulation
• Surge protection circuits
• Reference voltage sources in harsh environments

Procurement Notes

Verify the specific suffix requirements against the datasheet before ordering. The 'A' suffix indicates a standard tolerance of plus or minus 10 percent on the Zener voltage. Confirm that the required polarity matches the standard anode-to-case configuration unless an 'R' suffix is explicitly specified for reverse polarity. Ensure adequate mounting hardware and heat sinking are available to support the 50 watt power rating.

Selection Notes

Select this component when a robust, high-power Zener diode is required for critical applications. The DO-5 package allows for direct stud mounting to chassis heatsinks. Consider the thermal derating curve if the case temperature exceeds 75 degrees Celsius. Verify that the application environment does not require military screening levels such as JAN or JANTX qualifications.

Part Context

This part belongs to the 1N3305 through 1N3350B series manufactured by Microsemi Scottsdale Division. These devices are designed for high reliability and operate over a wide temperature range from negative 65 degrees Celsius to positive 175 degrees Celsius. The series covers a broad spectrum of Zener voltages from 3.9 volts to 200 volts.

Replacement Considerations

Consult the manufacturer for surface mount equivalents. Military qualified versions include JAN1N3306A, JANTX1N3306A, and JANTXV1N3306A.