1N2809RB

Overview

The Microchip Technology 1N2809RB is a high-power Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 11 V with a ±5% tolerance, ensuring precise reference levels in critical circuits. The component supports a maximum power dissipation of 50 W, allowing it to handle significant energy loads without thermal failure. Housed in the TO-204AD (TO-3) through-hole package, it offers reliable mechanical stability and efficient heat dissipation capabilities suitable for industrial environments.

Feature Summary

• Provides stable voltage regulation with a nominal breakdown voltage of 11 V
• Capable of dissipating up to 50 W of power for high-energy applications
• Features tight voltage tolerance of ±5% for accurate circuit referencing
• Constructed in a durable TO-204AD (TO-3) through-hole package

Applications

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

Procurement Notes

Verify the manufacturer marking matches Microchip Technology specifications. Confirm the package type is TO-204AD (TO-3) and the voltage rating is exactly 11 V. Check for physical damage to the leads or casing. Ensure the component is new and original, as counterfeit parts may exhibit incorrect voltage tolerances or power handling capabilities. Request batch traceability documentation if required for your quality assurance standards.

Selection Notes

Select this component when a 50 W power rating and 11 V nominal Zener voltage are required. The TO-204AD package necessitates adequate heatsinking and board space compared to smaller surface-mount alternatives. Consider the ±5% tolerance if tighter precision is needed, which would require different part numbers. Ensure the operating temperature range aligns with the application's environmental conditions, typically extending up to 175°C junction temperature.

Part Context

This device belongs to the 1N2804 series of high-power Zener diodes manufactured by Microchip Technology. The series includes various voltage ratings from 1N2804 to 1N2846B, all sharing similar power handling characteristics. These components are JEDEC registered and designed for general-purpose voltage regulation in demanding electronic systems. The RB suffix typically indicates specific testing or binning criteria within the manufacturer's lineup.

Replacement Considerations

Direct replacements include other 1N2809 variants from different manufacturers that meet the 11 V, 50 W, and TO-204AD package specifications. Verify that substitute parts maintain the same ±5% voltage tolerance and impedance characteristics. Ensure the replacement component has equivalent thermal resistance and maximum operating temperature ratings to guarantee system reliability.