1N4459R

Single Diodes Overview

The Microchip Technology 1N4459R is a high-power silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a power dissipation rating of 50 W. The component utilizes a hermetically sealed TO-3 (TO-204AD) metal case, supporting stud mount installation. Key electrical parameters include a maximum reverse leakage current of 250 µA at the rated voltage and a specified test current of 10 A. The device operates within a junction temperature range of -65 °C to +200 °C, ensuring reliability in demanding industrial environments.

Single Diodes Feature Summary

• Hermetically sealed metal construction for environmental protection
• High power handling capability suitable for robust regulation tasks
• Stud mount configuration for efficient thermal management

Single Diodes Applications

• Industrial power supply voltage regulation
• Overvoltage protection circuits
• Reference voltage sources in test equipment

Single Diodes Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm tolerance and package variations. Confirm RoHS compliance status as historical data may vary by production batch. Ensure the procurement channel provides valid traceability for hermetically sealed components. Cross-reference the manufacturer part number with authorized distributor catalogs to validate current availability and manufacturing lifecycle status before finalizing orders.

Single Diodes Selection Notes

Select this component when high power dissipation and precise low-voltage regulation are required. The TO-3 package necessitates appropriate heatsinking and mounting hardware due to its stud-mount design. Evaluate thermal resistance requirements carefully to maintain junction temperatures within safe operating limits under continuous load conditions.

Single Diodes Part Context

This part belongs to the legacy 1N4xxx series of high-power Zener diodes manufactured by Microchip Technology. These components are characterized by their rugged metal case construction and high current handling capabilities. They serve as critical elements in power electronics where stable voltage references are essential despite significant power loads.

Single Diodes Replacement Considerations

Consult official substitution guides for compatible equivalents. Verify pinout compatibility and thermal characteristics when considering alternative manufacturers.