1N4912

Overview

The Microchip Technology 1N4912A/TR is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 12.8 V with a tight tolerance of 5%. The device operates in the DO-7-2 through-hole package and dissipates up to 400 mW. Key electrical characteristics include a maximum reverse leakage current of 15 uA, a Zener impedance of 50 Ohms, and a test current of 4 mA. It maintains functionality across an extended temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• Precision voltage reference capability with tight manufacturing tolerance
• Robust axial leaded construction suitable for high-reliability through-hole applications

Applications

• Precision voltage reference circuits requiring low temperature drift
• Overvoltage protection stages in sensitive electronic systems
• Voltage regulator references in industrial control equipment

Procurement Notes

Verify the specific suffix against official documentation, as packaging configurations such as reel quantities may differ from bulk options. Confirm that the required voltage tolerance and power dissipation ratings align with the target circuit design before finalizing procurement orders.

Selection Notes

Select this component when precise voltage stability over temperature is critical. Ensure the application can accommodate the specified 400 mW power dissipation and verify that the 12.8 V nominal output matches the system requirements. Consider the through-hole mounting style for mechanical robustness.

Part Context

This part belongs to Microchip's specialized Zener diode portfolio, focusing on temperature-compensated variants. Unlike standard Zener diodes, these components utilize specific junction engineering to minimize voltage drift with temperature changes, making them distinct from general-purpose regulation devices.

Replacement Considerations

Consult official substitution guides for compatible equivalents. Verify that any alternative part matches the 12.8 V nominal voltage, 5% tolerance, and DO-7-2 package dimensions to ensure direct fitment without circuit modification.