1N2808A

Overview

The Microchip Technology 1N2808A is a hermetically sealed silicon Zener diode designed for high-power voltage regulation applications. It features a nominal Zener voltage of 10V with a tolerance of ±10% and a maximum power dissipation of 50W. The device utilizes an internal solder bond construction within a TO-204AD (TO-3) through-hole package, ensuring robust mechanical integrity. Its maximum dynamic impedance is specified at 0.6 Ohms, providing stable voltage reference characteristics under varying current conditions.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond design for enhanced mechanical reliability
• High power handling capability suitable for demanding regulation tasks

Applications

• High-power voltage regulation circuits
• Industrial equipment power supplies
• Military and aerospace electronic systems requiring hermetic sealing

Procurement Notes

Verify the manufacturer origin, as this component was originally JEDEC registered and may be produced by various qualified sources including Microchip or legacy manufacturers like Motorola. Confirm the package type is TO-204AD and that the device meets the specific hermetic sealing requirements for your application environment. Ensure the datasheet aligns with the required 50W power rating and 10V Zener voltage specifications before finalizing procurement.

Selection Notes

Select this component when a high-power, hermetically sealed Zener diode is required for critical voltage regulation. The TO-204AD package necessitates appropriate heat sinking solutions to manage the 50W thermal load effectively. Consider the ±10% voltage tolerance and 0.6 Ohm dynamic impedance when designing precision reference circuits. This part is suitable for environments where moisture resistance and long-term stability are paramount.

Part Context

The 1N2808A belongs to the JEDEC registered 1N2804 through 1N2846B series of silicon Zener diodes. These components are characterized by their rugged construction and ability to handle significant power dissipation. The series is widely recognized in industrial and military sectors for its reliability and consistent performance in harsh operating conditions.

Replacement Considerations

Compatible substitutes include other parts from the 1N2804–1N2846B series or equivalent 10V 50W hermetic Zener diodes from qualified manufacturers. Verify that any replacement maintains the TO-204AD footprint and hermetic seal specification to ensure mechanical and environmental compatibility.