1N4550B

Single Zener Diodes Overview

The Microchip Technology 1N4550B is a high-power 50 W Zener diode from the 1N3305 through 1N3350B and 1N4549 through 1N4556 series. It provides voltage regulation with a nominal Zener voltage of 4.3 V at a test current of 2,900 mA. The device features a maximum dynamic impedance of 0.16 Ohms and a typical temperature coefficient of -0.033 %/°C. It operates within a junction and storage temperature range of -65°C to +175°C. The component utilizes a DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction with internal solder bond
• Standard polarity connects anode to case; reverse polarity available via suffix
• Inherently radiation hard per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation in power supplies requiring broad operating current ranges
• High power dissipation applications with adequate mounting and heat sinking
• Military and aerospace systems utilizing JAN, JANTX, or JANTXV qualifications

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm tolerance and polarity requirements. The 'B' suffix indicates a standard +/- 5% Zener voltage tolerance. Confirm if reverse polarity is required by checking for an 'R' suffix. Ensure the procurement specification matches the JEDEC registered part number format. Consult factory documentation for surface mount equivalents or specialized screening levels.

Single Zener Diodes Selection Notes

Select this component for applications demanding 50 W power dissipation capability. Verify thermal management requirements against the 0.5 W/°C derating curve above 75°C case temperature. Consider the DO-5 package dimensions and hexagonal stud mounting hardware availability. Evaluate the -0.033 %/°C temperature coefficient for circuit stability needs. Confirm compatibility with the specified forward voltage and reverse current limits.

Single Zener Diodes Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 thru 1N3350B and 1N4549 thru 1N4556 series of 50 Watt Zener Diodes. These components are designed for robust voltage regulation in industrial and military environments. The series offers a wide selection of voltages ranging from 3.9 V to 200 V. They are available in various military qualification levels including JAN, JANTX, and JANTXV.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with a 4.3 V nominal voltage. Verify that replacement devices meet the same thermal resistance and power derating specifications. Check for matching polarity configurations and hermetic sealing requirements.