1N4974US/TR

Single Zener Diodes Overview

The 1N4974US/TR is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 47 V with a 5% tolerance and operates at a test current of 25 mA. The device dissipates up to 5 W of power within an extended temperature range from -65 °C to +175 °C. Key electrical characteristics include a maximum reverse leakage current of 2 uA, a Zener impedance of 25 Ohms, and a voltage temperature coefficient of 0.095 %/°C. It utilizes the D-5B-2 package and is supplied in reel packaging.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at 47 V with high thermal endurance suitable for demanding environments.
• Engineered for surface-mount integration using the D-5B-2 package format.
• Capable of handling significant power dissipation up to 5 W while maintaining low leakage currents.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise regulation
• Overvoltage protection in industrial electronics
• Power supply stabilization systems

Single Zener Diodes Procurement Notes

Verify the specific suffix TR indicates reel packaging configuration when sourcing. Confirm RoHS status N compliance requirements against project specifications. Ensure the D-5B-2 footprint matches the target PCB layout design. Validate that the 5 W power rating aligns with thermal management capabilities in the final assembly environment.

Single Zener Diodes Selection Notes

Select this component for designs requiring a 47 V Zener voltage in a compact surface-mount form factor. Consider the 25 Ohm impedance and 2 uA leakage for precision applications. The wide operating temperature range supports use in harsh conditions where standard commercial parts may fail. Ensure adequate heat sinking is provided to manage the 5 W dissipation capability effectively.

Single Zener Diodes Part Context

This part belongs to the Microchip Zener Diode family, specifically optimized for surface-mount technology. It serves as a robust voltage regulator alternative to through-hole variants like JAN1N4974C. The US designation typically denotes a square Melf-style package, offering higher power density compared to smaller signal diodes.

Single Zener Diodes Replacement Considerations

JAN1N4974C is a verified axial leaded substitute offering identical 47 V regulation but requires different mounting techniques. Verify package compatibility and thermal performance differences between the SMT US variant and the THT C variant before substitution.