1N2817A

Overview

The Microchip Technology 1N2817A is a silicon Zener diode rated for 50 watts of power dissipation. It features a nominal Zener voltage of 19 V with a tolerance of ±10%. The component is designed for through-hole mounting in the TO-204AD (TO-3) package, which provides robust thermal management capabilities suitable for high-power applications.

Feature Summary

• High power handling capability of 50 watts
• Hermetically sealed construction for reliability
• Through-hole mounting for secure installation

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage sources

Procurement Notes

Verify the manufacturer origin, as both Microchip and Microsemi have produced this part number. Confirm the specific suffix indicates the standard ±10% tolerance version. Ensure the package matches the required TO-204AD footprint and check for RoHS compliance status if lead-free operation is mandated by the design specifications.

Selection Notes

Select this component when a stable 19 V reference is required at high power levels. The TO-204AD package necessitates adequate heatsinking or chassis mounting to maintain junction temperature within limits. Consider the ±10% voltage tolerance against circuit requirements before choosing over tighter tolerance variants.

Part Context

This device belongs to the family of 50-watt silicon Zener diodes manufactured by Microchip Technology. It shares the same physical package and general power rating as other parts in the series but differs in its specific breakdown voltage characteristics defined by the JEDEC type number designation.

Replacement Considerations

Direct substitutes include other manufacturers' equivalents meeting the 19V, 50W, TO-204AD specification. Verify pinout compatibility and thermal resistance values before substitution.