1N3307B

Overview

The Microchip Technology 1N3307B is a high-power 50 W Zener diode within the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 8.2 V at a test current of 1,500 mA and a maximum dynamic impedance of 0.40 Ohms. The device features a hermetically sealed DO-5 (DO-203AB) metal and glass case with an internal solder bond construction. It operates across a junction and storage temperature range of -65°C to +175°C.

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 characteristics

Applications

• Voltage regulation in power supplies
• High power protection circuits
• Industrial control systems

Procurement Notes

Verify the specific manufacturer origin, as this component originates from the Microsemi Scottsdale Division now part of Microchip Technology. Confirm that the ordering suffix 'B' corresponds to the required +/- 5% voltage tolerance. Ensure the application environment supports the specified thermal dissipation requirements and mounting hardware constraints associated with the DO-5 stud package.

Selection Notes

Select this component when a robust, high-power Zener diode is required for voltage clamping or regulation. The 50 W power rating allows operation with adequate heat sinking. Consider the standard anode-to-case polarity; if cathode-to-case connection is needed, verify availability of the reverse polarity variant with the 'R' suffix. Evaluate thermal management needs against the maximum junction temperature limits.

Part Context

This component belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. These devices are designed for applications requiring broad voltage selection and high power handling capabilities. The series offers various voltage options ranging from 3.9 V to 200 V, packaged in the industry-standard DO-5 form factor.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with an 8.2 V nominal voltage and similar impedance characteristics. Verify mechanical dimensions and thermal resistance specifications before substitution.