ESD-R-28C

Overview

The KEMET ESD-R-28C is a nickel zinc ferrite toroidal core designed for electromagnetic interference suppression. It features an inner diameter of 16 mm, an outer diameter of 28 mm, and an external length of 13 mm. The component operates within a temperature range of -25°C to +85°C and is rated for frequencies up to 300 MHz. Packaged in bulk, this solid free-hanging ring provides a robust solution for cable noise reduction without requiring mounting hardware.

Feature Summary

• Solid nickel zinc construction for effective high-frequency noise attenuation
• Free-hanging design allows easy installation around cables
• Toroidal geometry ensures uniform magnetic field distribution

Applications

• Electromagnetic interference suppression on data cables
• Common mode noise filtering in electronic assemblies
• ESD protection for signal lines

Procurement Notes

Verify the specific manufacturer part number against official KEMET documentation to ensure compatibility with design requirements. Confirm that the nickel zinc material composition aligns with the intended frequency range of operation. Check for RoHS compliance status if required by regulatory standards. Ensure storage conditions maintain component integrity prior to assembly.

Selection Notes

Select this component when a non-mountable, through-cable ferrite solution is required for EMI mitigation. The 16 mm inner diameter accommodates standard cable bundles. Consider the operating temperature limits and frequency response characteristics relative to the noise spectrum being suppressed. Evaluate physical space constraints around the cable path to ensure the 28 mm outer diameter fits the application envelope.

Part Context

This component belongs to the ESD-R series of ferrite rings manufactured by KEMET. These cores are specifically engineered for suppressing electromagnetic interference on cables and wires. The series utilizes nickel zinc ferrite materials, which offer high permeability at higher frequencies compared to manganese zinc alternatives, making them suitable for digital signal and power line noise control.

Replacement Considerations

Consult official KEMET substitution guides for verified equivalents. Ensure any replacement maintains identical inner and outer dimensions to fit existing cable assemblies. Verify that the substitute material exhibits comparable impedance characteristics at the target frequency.