1N2811A

Overview

The Microchip Technology 1N2811A is a high-power Zener diode designed for robust voltage regulation in through-hole applications. It features a nominal Zener voltage of 13 V with a tolerance of ±10% and a maximum power dissipation of 50 W. The device utilizes a TO-204AD (TO-3) package, supporting an operating temperature range from -65°C to 175°C. Key electrical characteristics include a reverse leakage current of 10 µA at 9.9 V and a forward voltage of 1.5 V at 10 A. The dynamic impedance is specified at a maximum of 1.1 Ohms.

Feature Summary

• High power handling capability of 50 W for demanding regulation tasks
• Extended thermal stability with operation up to 175°C
• Robust TO-204AD through-hole construction for secure mounting

Applications

• Industrial power supply voltage regulation
• Overvoltage protection circuits
• Reference voltage generation in high-power systems

Procurement Notes

Verify the specific manufacturing lot and date code upon receipt to ensure compliance with project timelines. Confirm RoHS status as the component is noted as non-compliant in available documentation. Validate that the TO-204AD package dimensions match the design requirements before final assembly integration.

Selection Notes

Select this component when high power dissipation and wide temperature operation are required. Ensure the circuit design accounts for the 50 W power rating and appropriate heat sinking. Verify that the 13 V Zener voltage aligns with the target regulation point and that the ±10% tolerance meets system accuracy specifications.

Part Context

The 1N2811A belongs to the 1N2811 series of Zener diodes manufactured by Microchip Technology. This series is characterized by high power capabilities and is commonly used in industrial and automotive environments where reliability under extreme conditions is critical. The TO-204AD package provides mechanical strength suitable for rugged applications.

Replacement Considerations

Consult official Microchip documentation for verified cross-reference part numbers. Ensure any substitute maintains the 50 W power rating, 13 V Zener voltage, and TO-204AD package compatibility.