1N2808B

Overview

The Microchip Technology 1N2808B is a single Zener diode designed for through-hole mounting in the TO-204AD (TO-3) package. It features a nominal Zener voltage of 10 V with a tolerance of ±10% and a maximum power dissipation of 50 W. The device exhibits a maximum Zener impedance of 0.6 Ohms and operates within a temperature range of -65°C to 175°C. Reverse leakage current is specified at 25 µA when tested at 6.7 V, while the forward voltage drop is 1.5 V at a forward current of 10 A.

Feature Summary

• High power handling capability up to 50 W for robust voltage regulation
• Extended operating temperature range from -65°C to 175°C for harsh environments
• Low Zener impedance of 0.6 Ohms for stable voltage reference performance

Applications

• High-power voltage regulation circuits
• Overvoltage protection systems
• Industrial control equipment requiring wide temperature operation

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheets. Confirm RoHS status as non-compliant if environmental regulations apply. Ensure the TO-204AD package dimensions match the design footprint. Validate thermal management requirements given the 50 W power rating. Check for specific manufacturing date codes or lot traceability if required by quality standards.

Selection Notes

Select this component when high power dissipation and wide temperature stability are critical. Compare the 10 V Zener voltage and 50 W rating against circuit requirements. Consider the TO-204AD package size for board space constraints. Evaluate the 0.6 Ohm impedance for noise sensitivity needs. Verify that the ±10% tolerance meets the application's precision requirements.

Part Context

The 1N2808B belongs to the 1N2808 series of high-power Zener diodes manufactured by Microchip Technology. This series is characterized by its ability to handle significant power levels in a rugged axial leaded package. It serves as a reliable solution for applications demanding stable voltage references under varying thermal conditions.

Replacement Considerations

The 1N2808A is documented as a parameter-equivalent substitute. Both components share identical electrical specifications including voltage, power, and package type. Verify mechanical fit and marking differences before substitution.