1N4908A/TR

Overview

The Microchip Technology 1N4908A/TR is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 12.8 V with a tight tolerance of 5%. The device operates in the DO-7-2 axial through-hole package and dissipates up to 400 mW of power. Key electrical characteristics include a maximum reverse leakage current of 15 uA, a Zener impedance of 50 Ohms at a test current of 4 mA, and a voltage temperature coefficient of 0.01 %/C. It supports an extended operating temperature range from -65 C to +175 C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across varying thermal conditions
• Low voltage temperature coefficient provides high precision performance
• Robust construction suitable for demanding industrial environments

Applications

• Precision voltage reference circuits
• Temperature compensated regulator designs
• Industrial control systems requiring stable DC levels

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm the DO-7-2 package dimensions match your PCB footprint requirements. Ensure the 400 mW power dissipation rating aligns with your thermal management strategy. Check that the 12.8 V Zener voltage meets your circuit design specifications before finalizing procurement.

Selection Notes

Select this component when precise voltage stability over temperature is critical. The low temperature coefficient makes it superior to standard Zener diodes for reference applications. Consider the through-hole mounting style if surface space is limited or mechanical robustness is required. Verify compatibility with existing assembly processes for axial lead components.

Part Context

This part belongs to Microchip's temperature-compensated Zener diode family, offering enhanced stability compared to standard variants. It serves as a specialized solution for applications where voltage drift due to thermal changes must be minimized. The product line targets industries requiring reliable semiconductor components for long-term operation.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.