1N4554B

Single Zener Diodes Overview

The Microchip Technology 1N4554B is a high-power 50 W Zener diode from the 1N4549B through 1N4556B series. It provides voltage regulation with a nominal Zener voltage of 6.2 V at a test current of 2,000 mA. The device features a maximum dynamic impedance of 0.14 ohms and a maximum reverse current of 20 µA. It operates within a junction temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) hexagonal stud package.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction
• Internal solder bond design for reliability
• Standard polarity configuration with anode connected to case
• Radiation hard characteristics

Single Zener Diodes Applications

• High power voltage regulation
• Military and aerospace applications
• Harsh environment circuit protection

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin as the datasheet references Microsemi Scottsdale Division while the product identifier lists Microchip Technology. Confirm that the DO-5 hexagonal stud package matches the mechanical requirements of the target assembly. Ensure thermal management provisions accommodate the 50 W dissipation rating and derating curve above 75°C case temperature.

Single Zener Diodes Selection Notes

Select this component when high power handling and radiation hardness are required. The 6.2 V nominal voltage suits specific reference needs. Verify tolerance requirements against the B suffix specification. Consider the physical mounting constraints imposed by the hexagonal stud interface and standard anode-to-case polarity.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N4549B through 1N4556B series of 50 W Zener diodes. These devices share common mechanical and electrical characteristics including low thermal resistance and robust internal construction designed for demanding operational environments.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the 1N3305 through 1N3350B series or cross-referenced military qualified variants such as JAN or JANTX prefixes if screening levels differ.