1N4741AP/TR8

Overview

The Microchip Technology 1N4741AP/TR8 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tight tolerance of ±5%. The device operates in the DO-41 axial package and dissipates up to 1 W of power. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 6 Ohms, and a test current of 21 mA. It supports an operating temperature range from -65 °C to +150 °C.

Feature Summary

• Provides precise voltage regulation with a 5% tolerance on the 12 V Zener voltage.
• Engineered for high thermal stability with a maximum junction temperature rating of 150 °C.
• Utilizes a plastic encapsulated DO-41 axial package for robust through-hole mounting.

Applications

• Precision voltage reference circuits
• Overvoltage protection stages
• Power supply output regulation

Procurement Notes

Verify the specific suffix 'TR8' against the manufacturer's official documentation to confirm reel packaging quantities and orientation. Ensure the component meets required RoHS compliance status as indicated in the latest datasheet. Cross-reference the part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when a stable 12 V reference with tighter than standard 10% tolerance is required. The low Zener impedance of 6 Ohms ensures better line regulation compared to higher impedance alternatives. Verify that the 1 W power dissipation capability aligns with the thermal design of the target application circuit.

Part Context

This part belongs to the widely used 1N47xx series of silicon planar Zener diodes manufactured by Microchip Technology. The 'A' designation typically indicates the 5% voltage tolerance variant, distinguishing it from standard 10% tolerance versions. The TR8 suffix denotes the specific tape and reel packaging format used for automated assembly processes.

Replacement Considerations

Compatible substitutes include the 1N4741A (10% tolerance) or other 12 V Zener diodes in the DO-41 package from Microchip, such as the 1N4741B. Ensure replacement parts match the 1 W power rating and 150 °C maximum operating temperature specifications.