431178281

Overview

Fair-Rite 0431178281 is a snap-on ferrite core designed for cable electromagnetic interference suppression. It utilizes Fair-Rite Material 31, providing an impedance of 250 ohms at 100 MHz. The component features a round, hinged design with a free-hanging installation type. Internal dimensions include a 0.354-inch (8.99 mm) diameter bore. External measurements are 1.550 inches (39.37 mm) in length, with a width of 0.846 inches (21.49 mm) and a height of 0.415 inches (10.54 mm).

Feature Summary

• Hinged snap-on construction allows for easy installation onto existing cables without disconnection.
• Material 31 composition provides high permeability suitable for suppressing noise in the lower frequency range.
• Round cross-section geometry ensures uniform magnetic coupling around the enclosed conductor.

Applications

• Electromagnetic interference suppression on data and power cables
• Noise reduction in electronic equipment wiring harnesses
• Signal integrity improvement in communication systems

Procurement Notes

Verify the specific material designation and impedance characteristics against your application requirements before procurement. Confirm that the internal bore diameter accommodates the target cable assembly comfortably. Check for RoHS compliance status if required by your manufacturing standards. Ensure the hinge mechanism is intact upon receipt to guarantee secure closure during operation.

Selection Notes

Select this component when dealing with cables requiring suppression in the lower frequency spectrum where Material 31 is optimal. The snap-on format is preferred for retrofitting or applications where permanent attachment is impractical. Consider the external dimensions to ensure adequate clearance within the enclosure. Verify that the 250-ohm impedance at 100 MHz meets the specific noise profile of the system.

Part Context

This part belongs to Fair-Rite's Snap-It series, which specializes in split-round cable assemblies. These components are engineered for controlled impedance performance rather than precise dimensional tolerances. The series offers various material options to address different frequency ranges, with Material 31 being distinct for its high initial permeability characteristics compared to other standard ferrite materials.

Replacement Considerations

Direct replacements must match the Material 31 specification and similar impedance curves. Alternative snap-on cores from Fair-Rite may be considered if dimensions allow, provided the frequency response aligns with the original design intent. Generic ferrite clamps are not recommended unless their material properties and impedance values are explicitly verified against the 0431178281 datasheet.

FAQ

What is the primary function of Material 31 in this core?

Material 31 is formulated to provide high permeability, making it effective for suppressing electromagnetic interference in the lower frequency range, typically below 100 MHz.

How does the hinged design impact installation?

The hinged design allows the core to be opened and snapped around an existing cable, eliminating the need to disconnect or thread the cable through a solid core.