CIS21J121NE

Chip Ferrite Bead Overview

The CIS21J121NE is a multi-layer ferrite bead from Samsung Electro-Mechanics, designed for high-current power line filtering applications. It features an impedance of 120 Ohms at 100 MHz and supports a maximum current rating of 5A. The component utilizes a surface-mount 0805 package with dimensions of 2.00mm x 1.25mm. It exhibits a low DC resistance of 20mOhm, ensuring minimal signal loss while providing effective noise suppression in electronic circuits.

Chip Ferrite Bead Feature Summary

• Multi-layer construction optimized for high-current power line applications
• Provides effective electromagnetic interference noise suppression
• Low DC resistance design minimizes insertion loss

Chip Ferrite Bead Applications

• Power supply input filtering
• High-current circuit noise suppression
• Electronic device power line protection

Chip Ferrite Bead Procurement Notes

This component is officially classified as obsolete and no longer manufactured by Samsung Electro-Mechanics. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors or secondary market suppliers. Ensure that any available units are confirmed to be genuine parts with intact specifications before integration into new designs.

Chip Ferrite Bead Selection Notes

Engineers requiring this specific electrical profile must consider alternative components due to the part's discontinued status. Selection criteria should prioritize ferrite beads with equivalent 120 Ohm impedance at 100 MHz and a minimum 5A current rating. Verify that replacement options maintain compatible physical dimensions and thermal characteristics to ensure seamless integration into existing board layouts.

Chip Ferrite Bead Part Context

The CIS21J121NE belongs to the CIC/CIS series of chip beads from Samsung Semiconductor. This series is engineered for high-current applications, distinguishing it from standard signal-line ferrite beads. The component serves as a passive filter element within the broader category of EMI suppression devices used in consumer electronics and industrial equipment.

Chip Ferrite Bead Replacement Considerations

As the CIS21J121NE is obsolete, direct substitutes must match the 120 Ohm impedance at 100 MHz and 5A current rating. Potential alternatives include other 0805 package ferrite beads from manufacturers such as Murata or TDK, provided they meet the specific electrical requirements for high-current power line filtering.