1N4915A/TR

Overview

The Microchip Technology 1N4915A/TR is a single temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device operates within a power dissipation rating of 400 mW and utilizes a DO-7 axial through-hole package. Electrical characteristics include a reverse current of 15 µA at the test current of 7.5 mA, ensuring stable performance across an operating temperature range of -55°C to 100°C.

Feature Summary

• Temperature compensated design for stable voltage regulation across varying thermal conditions
• Precision voltage tolerance ensures accurate reference levels in sensitive circuits
• Robust axial leaded construction suitable for through-hole mounting techniques

Applications

• Precision voltage reference circuits requiring thermal stability
• Overvoltage protection systems utilizing stable breakdown characteristics
• Linear regulator biasing networks demanding consistent voltage drops

Procurement Notes

Verify the specific suffix TR indicates tape-and-reel packaging configuration when sourcing components. Confirm the manufacturer designation remains Microchip Technology to ensure authenticity and compliance with specified electrical tolerances. Cross-reference datasheet revisions to validate parameter consistency against current production batches before integration into final designs.

Selection Notes

Select this component when circuit requirements demand a fixed 12.8 V reference with minimal drift over temperature variations. The 400 mW power rating supports moderate current loads without excessive heating. Ensure the DO-7 package dimensions align with available PCB real estate and that the ±5% tolerance meets the system's accuracy constraints for voltage regulation tasks.

Part Context

This part belongs to the standard Zener diode family manufactured by Microchip Technology. It serves as a specialized variant optimized for temperature compensation rather than simple voltage clamping. The 1N4915A designation distinguishes it from non-compensated counterparts by offering superior thermal stability, making it suitable for high-precision analog applications where voltage drift must be minimized.

Replacement Considerations

Direct substitutes must match the 12.8 V Zener voltage, 400 mW power rating, and DO-7 package. Verify that alternative candidates also provide temperature compensation characteristics to maintain equivalent thermal stability. Ensure pinout compatibility and electrical tolerances align with the original design specifications to prevent circuit malfunction.