FCB-0402-121A

Chip Ferrite Bead Overview

The FCB-0402-121A is a general-purpose ferrite bead from Signal Transformer, designed for surface-mount applications in the 0402 (1005 metric) package. It exhibits an impedance of 120 Ohms at a test frequency of 100 MHz and supports a maximum DC current of 500 mA. The component features a maximum DC resistance of 250 mOhms and a tolerance of 25%. It operates within a temperature range of -55°C to +125°C, with physical dimensions of 1 mm in length, 0.5 mm in width, and 0.5 mm in height.

Chip Ferrite Bead Feature Summary

• Provides signal integrity protection through high-frequency noise attenuation via ferrite material properties.
• Designed for compact surface-mount integration using standard 0402 footprint dimensions.
• Capable of handling continuous DC currents up to 500 mA without saturation.

Chip Ferrite Bead Applications

• Power line filtering in portable electronic devices
• Noise suppression on data lines in consumer electronics
• EMI reduction in compact circuit boards

Chip Ferrite Bead Procurement Notes

Verify the specific impedance value at 100 MHz against design requirements. Confirm that the 0402 package dimensions align with the PCB land pattern. Ensure the operating temperature range meets the environmental conditions of the final assembly. Check RoHS compliance status if required by regulatory standards.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0402 footprint. Choose based on the 120 Ohm impedance target for the specific noise frequency spectrum. Verify that the 500 mA current rating exceeds the maximum expected DC load. Consider the low DC resistance to minimize voltage drop in power paths.

Chip Ferrite Bead Part Context

This part belongs to Signal Transformer's general-purpose ferrite bead lineup. It is distinct from shielded power inductors like the SCRH8D43 series due to its passive noise-suppression function rather than energy storage. The 0402 size places it in the ultra-compact category suitable for high-density layouts.

Chip Ferrite Bead Replacement Considerations

Cross-reference with other 0402 ferrite beads offering 120 Ohms @ 100 MHz. Verify equivalent current ratings and DC resistance values. Ensure mechanical compatibility with existing footprints before substitution.

Chip Ferrite Bead FAQ

What is the test frequency for the specified impedance?

The impedance of 120 Ohms is measured at a test frequency of 100 MHz.

Does this component support high-temperature operation?

Yes, the component is rated for a maximum operating temperature of +125°C.