B-20F-38

Overview

The KEMET B-20F-38 is a solid ferrite bead core designed for EMI suppression in general electronics. It features a toroidal shape with an inner diameter of 1.5mm, an outer diameter of 3.8mm, and a length of 4.3mm. Constructed from MnZn material, this component operates effectively for noise suppression applications.

Feature Summary

• Solid toroidal construction for consistent magnetic properties
• MnZn material composition optimized for high-frequency noise attenuation
• Designed for single-pass cable insertion to reduce electromagnetic interference

Applications

• General electronics EMI suppression
• Round cable noise filtering
• Signal line interference reduction

Procurement Notes

Verify the specific impedance characteristics at target frequencies against application requirements. Confirm that the 1.5mm inner diameter accommodates the cable gauge without excessive force. Ensure the MnZn material grade aligns with the expected operating temperature range and frequency spectrum for effective noise suppression performance.

Selection Notes

Select this component when a fixed-size, solid ferrite core is required for round cables. The 1.5mm bore size dictates the maximum cable diameter. Consider the physical dimensions (3.8mm x 4.3mm) for spatial constraints within the assembly. Evaluate if the standard impedance profile meets the specific EMI mitigation needs of the circuit.

Part Context

This part belongs to the KEMET B-20 series of ferrite bead cores. These components are widely used for common-mode noise suppression on data and power lines. The B-20 series offers various sizes to fit different cable diameters, providing a standardized solution for EMI compliance in electronic assemblies.

Replacement Considerations

Check for equivalent parts with matching 1.5mm inner diameter and similar MnZn material properties. Verify dimensional compatibility with existing fixtures. Ensure the replacement maintains comparable impedance curves across the relevant frequency range.