BF1125-3

Overview

The Delevan BF1125-3 is a clip-on ferrite core designed for cable noise suppression. It features an API-1 material composition providing an impedance of 191 ohms at 100 MHz. The component has a circular design with a hinged clip mechanism for free-hanging installation. Internal dimensions include a 0.138-inch (3.50mm) diameter bore, while external measurements are 0.461 inches wide by 0.512 inches high and 0.984 inches long.

Feature Summary

• Hinged clip design allows secure attachment to cables without soldering or permanent modification
• API-1 ferrite material provides effective electromagnetic interference suppression in the specified frequency range
• Free-hanging installation type supports flexible routing and integration into existing wiring harnesses

Applications

• Cable noise suppression in electronic assemblies
• Electromagnetic interference filtering for signal and power lines
• Retroactive EMI mitigation on existing wire harnesses

Procurement Notes

Verify the specific part number BF1125-3 against manufacturer documentation to confirm API-1 material specifications and impedance characteristics. Ensure compatibility with cable diameters up to 0.138 inches. Check for RoHS compliance status as indicated in official datasheets before finalizing procurement decisions.

Selection Notes

Select this component when retrofitting EMI protection onto cables with diameters near 3.50mm. The hinged design facilitates installation where disassembly is difficult. Verify that the 191-ohm impedance at 100 MHz aligns with the target noise frequencies. Consider the physical dimensions for clearance within the enclosure.

Part Context

This ferrite core belongs to the BF series from Delevan, specialized for clip-on applications. Unlike molded inductors, these cores focus on suppressing common-mode noise on existing cables rather than serving as discrete circuit components. They are distinct from the axial leaded RF inductors also produced by the manufacturer.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify internal bore diameter and impedance curves when evaluating alternative ferrite cores from other manufacturers.