78271131

Overview

The Würth Elektronik part number 78271131 is a split core ferrite clamp belonging to the WE-CAR-TEC series, designed for automotive applications. It features a square shape with an internal diameter of 7.5 mm and external dimensions of 6.0 mm by 7.5 mm. The component utilizes 4W620 ferrite material, providing an impedance of 125 Ω at 25 MHz and 235 Ω at 100 MHz. It operates within a temperature range of -40°C to +125°C and complies with AEC-Q200 standards.

Feature Summary

• Snap-fit design allows for rapid installation on existing cables without disconnection
• AEC-Q200 qualified for reliable performance in automotive environments
• Keyed opening mechanism ensures correct alignment during assembly

Applications

• Automotive cable harness noise suppression
• Power line filtering in vehicle electronics
• Data bus protection against electromagnetic interference

Procurement Notes

Verify that the specific order matches the 78271131 identifier to ensure the 7.5 mm aperture and 235 Ω impedance specifications are met. Confirm compliance with AEC-Q200 requirements if the application involves automotive systems. Check datasheet revisions for any updates to dimensional tolerances or material composition before finalizing procurement.

Selection Notes

Select this component when a snap-on solution is required for cables up to 7.5 mm in diameter. The WE-CAR-TEC series is appropriate for high-temperature automotive environments due to its extended operating range. Ensure the target cable fits within the specified internal diameter limits to maintain effective magnetic coupling and impedance characteristics.

Part Context

This component is part of the WE-CAR-TEC family, which specializes in ferrite cores for automotive use. Unlike standard industrial ferrites, these are engineered to withstand harsh thermal conditions and vibration typical in vehicles. The series offers various aperture sizes to accommodate different cable diameters while maintaining consistent noise suppression performance.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. When replacing, ensure the alternative has matching impedance values at 25 MHz and 100 MHz, similar physical dimensions, and compatible temperature ratings.