1N3307A

Overview

The Microchip Technology 1N3307A is a high-power 50 W Zener diode belonging to the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 8.2 V and a tolerance of ±10%. The device operates within a junction and storage temperature range of -65°C to +175°C. It features a maximum DC Zener current of 5,200 mA and utilizes a DO-5 (DO-203AB) package with a hexagonal stud mount.

Feature Summary

• Hermetically sealed welded construction with internal solder bond design
• Low thermal resistance for efficient heat dissipation at full power
• Inherently radiation hard per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation in high-power industrial systems
• Protection circuits requiring robust thermal performance
• Military and aerospace applications utilizing JAN, JANTX, or JANTXV qualifications

Procurement Notes

Verify the specific suffix requirements when ordering. The 'A' suffix indicates a ±10% voltage tolerance, while 'B' denotes ±5%. An 'R' suffix signifies reversed polarity where the cathode connects to the case. Confirm military qualification prefixes such as JAN, JANTX, or JANTXV are included if required by the application specifications.

Selection Notes

Select this component for applications demanding high power dissipation up to 50 watts. Ensure adequate mounting and heat sinking are provided to maintain the case temperature below 75°C for full rated power operation. Consider the standard anode-to-case polarity unless the 'R' suffix variant is specified for cathode-to-case connection.

Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 W Zener diodes manufactured by Microsemi, now part of Microchip Technology. These devices are designed for rugged environments and offer a broad selection of voltages ranging from 3.9 V to 200 V. The series supports various screening levels including standard commercial and military qualifications.

Replacement Considerations

Equivalent parts include the 1N3307B for tighter tolerance requirements. Military equivalents are available with JAN, JANTX, or JANTXV prefixes.