CIM21U121NE

Chip Ferrite Bead Overview

The CIM21U121NE is a single-line ferrite bead from the Samsung Electro-Mechanics CIM21 series, designed for surface-mount applications in the 0805 (2012 Metric) package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 100 milliohms and a rated current of 800 mA. The component measures 2.00mm x 1.25mm x 1.10mm and operates within a temperature range of -55°C to 125°C.

Chip Ferrite Bead Feature Summary

• Provides high impedance to suppress electromagnetic interference in power lines
• Compact 0805 surface-mount footprint for space-constrained designs
• Low DC resistance minimizes voltage drop and power loss
• Wide operating temperature range suitable for diverse environments

Chip Ferrite Bead Applications

• Power line filtering in portable electronic devices
• Noise suppression in mobile communication equipment
• EMI reduction in consumer electronics circuits

Chip Ferrite Bead Procurement Notes

This component is obsolete and no longer manufactured by Samsung Electro-Mechanics. Verification of availability requires checking authorized distributors for remaining stock or approved substitutes. Ensure any replacement part matches the original electrical specifications and physical dimensions to maintain circuit integrity.

Chip Ferrite Bead Selection Notes

Select this component when a 120 Ohm impedance at 100 MHz is required for noise suppression in 0805 packages. Consider the 800 mA current rating and low DCR for power line applications. Due to its obsolete status, evaluate parameter-equivalent alternatives from other manufacturers that meet the same electrical and mechanical requirements.

Chip Ferrite Bead Part Context

The CIM21U121NE belongs to the CIM21 series of multilayer ferrite beads. This series is characterized by high permeability materials and compact SMD construction. The component is designed for effective EMI suppression in digital circuits and power supplies where space is limited.

Chip Ferrite Bead Replacement Considerations

Public confirmed substitute: BLM21PG221SN1D (Murata Electronics). Verify compatibility as the substitute offers 220 Ohms impedance compared to the original 120 Ohms.