74278021

Overview

The Würth Elektronik 74278021 is a solid free-hanging flat ferrite core from the WE-FLAT series, designed for EMI suppression on flat cables. It utilizes 4W620 material and provides an impedance of 58 Ohms at 100 MHz. The component features an inner dimension of 20.00 mm width by 0.70 mm height and an outer dimension of 23.00 mm width by 3.00 mm height. The total length is 12.00 mm.

Feature Summary

• Solid construction suitable for free-hanging mounting applications
• Optimized geometry for clamping onto flat ribbon cables
• High permeability material for effective high-frequency noise attenuation

Applications

• EMI suppression for digital equipment flat cables
• Noise filtering in general electronic equipment
• Automotive component signal line protection

Procurement Notes

Verify the specific part number against the manufacturer's latest datasheet to ensure material composition and dimensional tolerances match design requirements. Confirm RoHS3 compliance status and check for any recent product change notices that may affect specifications or availability before finalizing procurement orders.

Selection Notes

Select this component when space constraints require a low-profile solution for flat cable bundles. Ensure the cable thickness falls within the 0.70 mm inner height specification. Consider the 58 Ohm impedance characteristic at 100 MHz to verify compatibility with the target noise frequency spectrum of the application circuit.

Part Context

This component belongs to the WE-FLAT series of flat cable ferrites manufactured by Würth Elektronik. These cores are specifically engineered to provide compact EMI suppression solutions where traditional round toroids are unsuitable due to space or cable geometry limitations.

Replacement Considerations

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