1N2839RB

Overview

The Microchip Technology 1N2839RB is a high-power silicon Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 100 V with a tight tolerance of ±2%, ensuring precise reference levels in critical circuits. The device is rated for a maximum power dissipation of 50 W, allowing it to handle significant energy loads without thermal failure. It utilizes the TO-204AD (TO-3) flange mount package, which facilitates efficient heat transfer to external heatsinks. Operating within a junction temperature range of -65°C to +175°C, this component provides reliable performance in demanding industrial and military environments.

Feature Summary

• High power handling capability with 50 W dissipation rating
• Precision voltage regulation with ±2% tolerance
• Extended thermal stability across wide operating temperatures
• Robust metal flange mount construction for effective cooling

Applications

• High-voltage power supply regulation
• Industrial control system protection
• Military aerospace electronic circuits
• Overvoltage protection in heavy machinery

Procurement Notes

Verify the specific suffix RB against official Microchip documentation to confirm exact tolerance and testing parameters. Ensure procurement channels provide genuine components with traceable manufacturing data. Confirm RoHS compliance status as historical Microchip TO-204AD devices may not meet current environmental directives. Validate package dimensions against design constraints before integration.

Selection Notes

Select the 1N2839RB when circuit requirements demand high voltage stability under significant power loads. The TO-204AD package necessitates appropriate mechanical mounting hardware and thermal interface materials. Consider the ±2% tolerance for precision references where tighter variations are unacceptable. Evaluate thermal management solutions to maintain junction temperatures within safe operating limits during continuous operation.

Part Context

The 1N2839RB belongs to Microchip's legacy high-power Zener diode portfolio, continuing the reliability standards established by earlier semiconductor manufacturers. These components are widely recognized in industrial and defense sectors for their durability and consistent electrical characteristics. The TO-204AD form factor remains a standard for high-wattage discrete semiconductors requiring direct chassis or heatsink mounting.

Replacement Considerations

Cross-reference with other 100 V, 50 W Zener diodes in the TO-204AD package from qualified manufacturers. Verify that substitute parts match the ±2% tolerance and thermal resistance specifications. Ensure pinout compatibility and mounting hole patterns align with existing PCB or chassis designs.