1N2815B

Overview

The 1N2815B is a single silicon Zener diode manufactured by Microchip Technology, designed for high-power voltage regulation applications. It features a nominal Zener voltage of 17 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W and operates in a through-hole TO-204AD (TO-3) package with three pins, including two tabs. Key electrical characteristics include a maximum reverse leakage current of 10 µA and a maximum forward voltage drop of 1.5 V. The dynamic impedance is specified at 1.8 Ω.

Feature Summary

• Provides stable voltage regulation at 17 V with tight ±5% tolerance
• Capable of handling high power dissipation up to 50 W
• Constructed in a robust hermetically sealed TO-3 metal case

Applications

• High-power voltage reference circuits
• Overvoltage protection systems
• Industrial testing equipment

Procurement Notes

Verify component authenticity as the 1N2815B may be discontinued or obsolete depending on the distributor. Confirm manufacturing origin, such as Microchip or New Jersey Semiconductor, as supply chain sources vary. Ensure the TO-3 package dimensions match the target PCB footprint. Check for specific suffix variations that might indicate different tolerance levels or packaging formats before finalizing orders.

Selection Notes

Select this component when a 17 V regulation point is required with significant power handling capabilities. The TO-3 package necessitates adequate thermal management solutions due to the 50 W rating. Compare against the 1N2815A if a wider 10% tolerance is acceptable. Ensure the application environment supports the through-hole mounting style and the physical size constraints of the metal case.

Part Context

The 1N2815B belongs to the standard Zener diode family produced by Microchip Technology, formerly Microsemi. It shares similarities with the 1N2815A but offers tighter voltage tolerance. This series is characterized by its use in rugged environments requiring reliable voltage clamping. The TO-3 package provides superior heat dissipation compared to plastic encapsulated alternatives.

Replacement Considerations

• 1N2815A