1N2817RB

Overview

The Microchip Technology 1N2817RB is a hermetically sealed silicon Zener diode designed for high-power voltage regulation applications. It features a nominal Zener voltage of 19 V with a maximum power dissipation rating of 50 W. The device utilizes a TO-204AD (TO-3) metal package, suitable for through-hole mounting in rugged environments. Key electrical characteristics include a maximum Zener impedance of 2.2 Ohms and a reverse leakage current of 10 µA at 15.2 V. The component supports an operating temperature range from -65°C to 175°C, ensuring reliability under extreme thermal conditions.

Feature Summary

• Hermetically sealed metal-glass construction for environmental protection
• High power handling capability up to 50 watts
• Wide operating temperature range for harsh conditions
• Low Zener impedance for stable voltage regulation

Applications

• High-power voltage reference circuits
• Overvoltage protection in industrial systems
• Power supply regulation modules
• Military and aerospace electronic equipment

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm tolerance and packaging variations. Confirm RoHS compliance status as historical data may vary by production lot. Ensure the supplier provides valid traceability documents for hermetic seal integrity. Cross-reference the manufacturer part number with current datasheets to validate active status or obsolescence notices before procurement.

Selection Notes

Select this component when high power dissipation and hermetic sealing are required. The 19 V nominal voltage suits specific regulation needs. Consider the TO-204AD package size for mechanical fit. Evaluate thermal management requirements given the 50 W rating. Compare impedance specifications against circuit stability requirements. Verify temperature range compatibility with the target application environment.

Part Context

This component belongs to the 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. These devices are characterized by their robust metal case construction and high power ratings. The series is commonly used in applications requiring reliable voltage regulation under demanding physical conditions. The 1N2817RB specifically denotes the 19 V variant within this lineup.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Microchip Technology for authorized cross-references or equivalent products meeting identical electrical and mechanical specifications.