74271251S

Overview

The Würth Elektronik part number 74271251S is a snap-on ferrite core from the STAR-TEC series, designed for electromagnetic interference suppression. It features a square shape with an internal diameter of 10 mm and external dimensions of 38 mm in length, 20 mm in width, and 26 mm in height. The core utilizes 4W620 material to provide an impedance of 525 Ω at 100 MHz and 100 Ω at 25 MHz. It operates within a temperature range of -25 °C to +105 °C and includes a safety key mechanism.

Feature Summary

• Incorporates a safety key technology to prevent accidental opening after installation.
• Utilizes 4W620 ferrite material for effective high-frequency noise attenuation.
• Features a snap-on design for rapid manual installation on cables without tools.

Applications

• General electronic equipment
• Power cable noise suppression
• Data line filtering

Procurement Notes

Verify the specific suffix 'S' against the manufacturer's current datasheet to confirm the presence of the safety key feature, as this distinguishes it from standard snap cores. Ensure the required aperture size matches the 10 mm internal diameter specification. Cross-reference the impedance values at 25 MHz and 100 MHz with your EMI requirements before finalizing the order.

Selection Notes

Select this component when a secure, tool-free installation is required for cables up to 10 mm in diameter. The integrated safety key ensures the core remains closed during operation, providing reliable retention compared to standard split cores. Consider the 4W620 material properties for applications requiring significant attenuation at 100 MHz.

Part Context

This component belongs to the STAR-TEC series of snap-on ferrites manufactured by Würth Elektronik. The series is characterized by its ease of use and robust construction for general electronic equipment. The 74271251S variant specifically integrates a locking mechanism to enhance mechanical stability during service life.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

What is the function of the safety key on this ferrite core?

The safety key prevents the snap-on core from accidentally opening after it has been clamped onto a cable, ensuring secure retention.

What is the maximum operating temperature for this component?

The maximum operating temperature for the 74271251S is +105 °C.