ESD-SR-250H

Overview

The KEMET ESD-SR-250H is a snap-on ferrite core designed for electromagnetic interference suppression on round cables. It features a hinged design for easy installation without cable disconnection. The component utilizes nickel-zinc material and provides an impedance of 130 Ω at 100 MHz and 71 Ω at 25 MHz. It has a circular opening diameter of 13 mm, with external dimensions of 30 mm x 30 mm x 42 mm. The unit operates up to a maximum temperature of 100°C and complies with RoHS standards.

Feature Summary

• Snap-on hinged design allows installation on existing cables without disconnecting connections
• Nickel-zinc composition provides effective high-frequency noise attenuation
• Compact rectangular geometry facilitates mounting in confined spaces

Applications

• Suppression of electromagnetic interference on round cables
• EMI filtering in automotive wiring harnesses
• Noise reduction in industrial control systems

Procurement Notes

Verify the specific impedance requirements against application frequency ranges, noting the 130 Ω rating at 100 MHz. Confirm that the 13 mm internal diameter accommodates the target cable bundle size. Ensure compliance with RoHS directives if required by the end product specifications. Check for any specific automotive qualification standards relevant to the deployment environment.

Selection Notes

Select this component when non-invasive installation on pre-assembled round cables is required. The nickel-zinc material is suitable for higher frequency applications compared to manganese-zinc alternatives. Consider the 13 mm aperture size to ensure it fits the cable diameter while allowing sufficient magnetic coupling for effective suppression.

Part Context

This part belongs to the ESD-SR Snap-on Cores series from KEMET. These cores are engineered specifically for rapid deployment on round cables to mitigate common mode noise. The series offers various sizes and materials to address different cable diameters and frequency spectra.

Replacement Considerations

Direct substitutes include other KEMET snap-on cores such as the ESD-SR-250 or ESD-R-25M-H, provided the physical dimensions and impedance characteristics match the original design requirements.