1N2829RB

Overview

The Microchip Technology 1N2829RB is a high-power Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 47V with a maximum power dissipation of 50W. The device utilizes a silicon unidirectional junction and is housed in a hermetically sealed TO-204AD (TO-3) metal package. Key electrical characteristics include a maximum reverse leakage current of 10µA and a maximum dynamic impedance of 5 Ohms. It operates within a temperature range of -65°C to 175°C, ensuring reliability in demanding environments.

Feature Summary

• High power handling capability with 50W dissipation rating
• Hermetically sealed metal package for environmental protection
• Wide operating temperature range suitable for harsh conditions

Applications

• High-power voltage reference circuits
• Overvoltage protection systems
• Industrial power supply regulation

Procurement Notes

Verify the specific tolerance grade (±5% or ±10%) required for your design, as variants exist. Confirm the package type matches your PCB footprint requirements. Ensure thermal management solutions are adequate for 50W dissipation. Check for RoHS compliance status if applicable to your manufacturing standards. Validate supplier authenticity to avoid counterfeit components.

Selection Notes

Select this component when high power dissipation and precise voltage regulation are critical. Consider the TO-3 package size constraints during mechanical design. Evaluate thermal resistance values for heat sink selection. Compare leakage current specifications against circuit sensitivity requirements. Assess operating temperature limits against expected environmental conditions.

Part Context

This part belongs to the standard Zener diode family from Microchip Technology. It is commonly used in industrial and military-grade electronics where reliability is paramount. The TO-3 package provides robust mechanical stability and efficient heat transfer. Similar parts in the series offer different voltage ratings while maintaining comparable power capabilities.

Replacement Considerations

Direct substitutes include other 47V 50W Zener diodes in TO-204AD packages from qualified manufacturers. Verify pinout compatibility and thermal characteristics before substitution. Cross-reference datasheets for dynamic impedance and leakage current tolerances. Ensure replacement parts meet the same hermetic sealing standards if required by the application.