1N4915/TR

Overview

The Microchip Technology 1N4915/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 (DO-35) 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 25 Ohms at a test current of 7.5 mA, and a low voltage temperature coefficient of 0.005 %/°C. It supports an extended operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• Low noise operation suitable for sensitive analog signal processing circuits
• High reliability construction utilizing silicon technology in a glass encapsulated package

Applications

• Precision voltage reference sources in measurement instrumentation
• Temperature compensation networks in electronic circuits
• Voltage regulation stages requiring low drift characteristics

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm packaging configuration and manufacturing lot details. Ensure compatibility with required environmental standards and lead times before finalizing procurement plans. Cross-reference datasheet revisions to validate parameter consistency.

Selection Notes

Select this component when precise voltage stability over temperature is critical. The low temperature coefficient distinguishes it from standard Zener diodes. Verify that the 400 mW power dissipation rating meets circuit requirements and that the DO-7-2 package fits the board layout constraints.

Part Context

This part belongs to Microchip's legacy discrete semiconductor portfolio, continuing production lines originally established by Microsemi. It serves as a specialized voltage regulator within the broader diode category, targeting industrial and aerospace markets where long-term availability and strict performance tolerances are mandatory.

Replacement Considerations

Consult official substitution guides for equivalent temperature-compensated Zener diodes with matching 12.8 V ratings and DO-7-2 packages. Verify pinout compatibility and thermal performance metrics before implementing any alternative components.