1N4912/TR

Overview

The 1N4912/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device is designed for through-hole mounting in a DO-7 (DO-204AA) axial leaded package. Key electrical specifications include a maximum power dissipation of 400 mW, a maximum reverse leakage current of 15 µA, and a Zener impedance of 25 Ohms at a test current of 7.5 mA. It operates within a temperature range of -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial environments
• Axial leaded package facilitates standard through-hole PCB integration

Applications

• Precision voltage reference circuits requiring low temperature drift
• Overvoltage protection stages in sensitive electronic systems
• Voltage regulator designs utilizing temperature-compensated references

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure compatibility with required packaging and testing standards. Confirm that the DO-7 package dimensions align with target board layouts. Cross-reference the 12.8 V specification with circuit requirements to validate performance under expected load conditions before finalizing procurement decisions.

Selection Notes

Select this component when precise voltage stability over extreme temperature ranges is critical. The 400 mW power rating supports moderate current applications without excessive heat generation. Ensure the 25 Ohm impedance meets noise sensitivity requirements. Compare against non-compensated alternatives if thermal stability is not a primary design constraint.

Part Context

This part belongs to Microchip's legacy discrete semiconductor portfolio, specifically within the Zener diode category. The 1N4912 designation indicates a specific voltage and compensation characteristic within the broader family of axial leaded regulators. It serves as a direct replacement for older industry-standard components while maintaining modern manufacturing quality controls.

Replacement Considerations

Direct substitutes include other temperature-compensated Zener diodes with identical 12.8 V ratings and DO-7 packages. Verify pinout compatibility and thermal characteristics when evaluating cross-brand alternatives.