1N3310A

Overview

The Microchip Technology 1N3310A is a high-power 50 W Zener diode belonging to the 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 12.0 V at a test current of 1,000 mA. The device features a maximum dynamic impedance of 1.00 Ohms and a typical temperature coefficient of +0.065 %/°C. 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
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge (ESD)
• Standard polarity connects anode to case

Applications

• Voltage regulation in power supplies
• High power protection circuits
• Harsh environment electronic systems

Procurement Notes

Verify the specific suffix requirements for tolerance and polarity before ordering. The 'A' suffix indicates a +/- 10% Zener voltage tolerance. Confirm that the standard anode-to-case polarity matches the circuit design, or specify the 'R' suffix for reverse polarity. Ensure mounting hardware supports the hexagonal stud configuration.

Selection Notes

Select this component for applications requiring robust voltage reference stability under high thermal loads. The DO-5 package allows direct stud mounting for efficient heat dissipation. Consider the positive temperature coefficient for circuits where voltage increases with temperature. Verify that the system can accommodate the required test current of 1,000 mA for accurate regulation.

Part Context

This part is manufactured by Microsemi Scottsdale Division and falls under the JEDEC registered 1N3305 through 1N3350B series. It is designed for high reliability in demanding environments. The series covers a broad voltage range from 3.9 V to 200 V, utilizing a standardized metal and glass hermetic package.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with matching 12.0 V specifications. Cross-reference electrical parameters such as dynamic impedance and thermal resistance to ensure compatibility.