1N4563B

Single Zener Diodes Overview

The Microchip Technology 1N4563B is a silicon unidirectional voltage regulator diode with a nominal Zener voltage of 6.8 V and a maximum power dissipation of 50 W. It utilizes the TO-204AD (TO-3) hermetically sealed package. The device provides voltage regulation across a broad range of operating currents and temperatures, featuring internal solder bond construction. Standard polarity configuration places the anode to the case.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• Inherently radiation hard design per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation in high-power circuits
• Radiation-hardened electronic systems
• Military and aerospace power supplies

Single Zener Diodes Procurement Notes

Verify the specific qualification level required for your application, as this component family includes JAN, JANTX, and JANTXV military grades per MIL-PRF-19500/114. Confirm whether standard or reverse polarity is needed, as the standard configuration features the anode connected to the case. Ensure adequate mounting and heat sinking are planned to support the 50 W power dissipation rating at case temperatures of 75 °C or higher.

Single Zener Diodes Selection Notes

Select this component when a robust, high-power Zener diode is required for critical applications. The 50 W rating allows for significant current handling compared to smaller packages. Consider the TO-3 package size constraints and thermal management requirements. Verify that the 6.8 V regulation point matches the circuit design needs and that the radiation hardness meets the operational environment specifications.

Single Zener Diodes Part Context

This part belongs to the 1N4557B through 1N4564B series of high-power 50 W Zener diodes. These devices are JEDEC registered and cover a voltage range from 3.9 V to 200 V. The series is designed for applications requiring reliable voltage regulation under harsh conditions, leveraging the durability of the TO-3 package and hermetic sealing technology.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other manufacturers' 1N4563B equivalents meeting the same electrical specifications. Military-grade replacements must comply with MIL-PRF-19500/114. Verify pinout compatibility, specifically the anode-to-case configuration, before substitution.