1N3320B

Overview

The Microchip Technology 1N3320B 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 22 V at a test current of 570 mA. The device features a maximum dynamic impedance of 2.5 Ohms and a typical temperature coefficient of +0.080 %/°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 metal and glass construction for durability
• Internal solder bond design ensuring structural integrity
• Standard polarity configuration with anode connected to the case
• Radiation hard characteristics suitable for harsh environments

Applications

• High power voltage regulation circuits
• Power supply protection systems
• Harsh environment electronic designs

Procurement Notes

Verify that the component matches the specific Microsemi/Microchip datasheet specifications for the 1N3320B part number. Confirm the package type is DO-5 (DO-203AB) with a hexagonal stud. Ensure the manufacturer documentation aligns with the required military or commercial qualification levels if applicable.

Selection Notes

Select this component when applications require high power dissipation capabilities up to 50 watts. Consider the thermal resistance of 2.0 °C/W maximum and the need for adequate heat sinking above 75°C case temperature. Verify that the 22 V breakdown voltage and tolerance meet the circuit requirements.

Part Context

This component belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microchip Technology's Scottsdale Division. These devices are designed for robust voltage regulation in demanding industrial and aerospace applications requiring high power handling.

Replacement Considerations

Consult factory for surface mount equivalents. Other parts in the 1N33xxB series may serve as substitutes if voltage ratings match.