1N4553A

Single Zener Diodes Overview

The Microchip Technology 1N4553A is a high-power 50 W Zener diode with a nominal voltage of 5.6 V and ±5% tolerance. It operates within a junction temperature range of -65°C to +175°C, featuring a maximum DC power dissipation of 50 watts at a case temperature below 75°C. The device utilizes a DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud for mounting. Electrical characteristics include a test current of 2,250 mA, a dynamic impedance of 0.12 Ohms, and a maximum reverse current of 20 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction
• Internal solder bond design
• Inherently radiation hard
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High power voltage regulation
• Military and aerospace systems
• Harsh environment applications

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements when ordering. The 'A' suffix indicates a standard polarity configuration with ±10% tolerance, while the 'B' suffix denotes ±5% tolerance. Confirm if the reversed polarity variant with an 'R' suffix is required for the intended circuit layout. Ensure thermal management meets the specified derating curves for continuous operation.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust voltage regulation under extreme conditions. The wide operating temperature range and radiation hardness make it suitable for demanding environments. Verify that the mounting hardware accommodates the hexagonal stud and that heat sinking allows for adequate power dissipation without exceeding the maximum junction temperature limits.

Single Zener Diodes Part Context

This part belongs to the 1N4549 through 1N4556 series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. These devices are JEDEC registered and offer a broad selection of voltages ranging from 3.9 V to 200 V. The series is designed for high reliability in critical applications where standard components may fail due to environmental stress or radiation exposure.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N3305 through 1N3350B series. Military qualified versions are available with JAN, JANTX, or JANTXV prefixes.