1N2808RB

Overview

The 1N2808RB is a high-power Zener diode manufactured by Microchip Technology, designed for robust voltage regulation in demanding environments. It features a nominal Zener voltage of 10 V with a tolerance of ±10% and a maximum power dissipation of 50 W. The device utilizes a TO-204AD (TO-3) through-hole package, ensuring reliable thermal management. Key electrical characteristics include a reverse leakage current of 25 µA at 6.7 V, a forward voltage of 1.5 V at 10 A, and a maximum impedance of 0.6 Ohms. It operates within a temperature range of -65°C to 175°C.

Feature Summary

• High power handling capability with 50 W maximum dissipation rating
• Wide operating temperature range suitable for extreme conditions
• Low impedance characteristic for stable voltage regulation
• Through-hole mounting for secure mechanical installation

Applications

• High-power voltage reference circuits
• Overvoltage protection systems
• Industrial power supply regulation
• Heavy-duty electronic equipment stabilization

Procurement Notes

Verify the specific suffix RB against official Microchip documentation to confirm exact manufacturing revisions or testing criteria. Confirm RoHS compliance status as historical data indicates non-compliance for some variants in this series. Validate lead times directly with authorized distributors due to potential availability constraints. Ensure the procurement channel provides genuine components with traceable origin to prevent counterfeits.

Selection Notes

Select this component when high power dissipation and wide temperature operation are required. The TO-204AD package necessitates adequate heatsinking and board space. Compare the 10 V Zener voltage and 50 W rating against circuit requirements. Consider the ±10% tolerance for precision applications. Verify compatibility with existing thermal management solutions before finalizing the design choice.

Part Context

This part belongs to the 1N2808 series of high-power Zener diodes from Microchip Technology. It shares the same basic electrical specifications as the 1N2808A but may differ in specific manufacturing lot attributes or testing parameters defined by the RB suffix. The series is known for reliability in industrial and military-grade applications requiring robust voltage clamping.

Replacement Considerations

The 1N2808B is listed as a parameter-equivalent substitute by Microchip Technology. Verify pinout compatibility and thermal performance equivalence before substitution. Ensure the replacement meets all environmental and electrical specifications required by the original design.