BKP1005EM121-T

Chip Ferrite Bead Overview

The BKP1005EM121-T is a multilayer ferrite chip bead manufactured by Taiyo Yuden, designed for high-current applications with low DC resistance. It features a 0402 (1005 metric) surface-mount package and provides an impedance of 120 Ohms at a test frequency of 100 MHz. The component supports a maximum DC current of 1 A and has a maximum DC resistance of 140 mOhms. Impedance tolerance is specified at 25%. It operates within a temperature range of -55°C to +85°C.

Chip Ferrite Bead Feature Summary

• Multilayer construction for compact high-current filtering
• Low DC resistance design to minimize power loss
• High current handling capability in small footprint

Chip Ferrite Bead Applications

• Power supply line noise suppression
• High-current signal path filtering
• DC-DC converter output filtering

Chip Ferrite Bead Procurement Notes

This component is officially listed as obsolete or discontinued by the manufacturer. Availability is restricted, and sourcing may require checking secondary distributors or verifying specific lifecycle status through official channels before integration into new designs.

Chip Ferrite Bead Selection Notes

Select this part for circuits requiring ferrite beads in 0402 packages that handle up to 1 A. Verify that the 120 Ohm impedance at 100 MHz matches the target noise spectrum. Ensure the operating environment stays within the -55°C to +85°C range and that the low DCR meets efficiency requirements.

Chip Ferrite Bead Part Context

Part of the BKP series from Taiyo Yuden, which focuses on high-current, low-resistance ferrite beads. This series utilizes multilayer technology to achieve performance in small SMD packages suitable for dense PCB layouts.

Chip Ferrite Bead Replacement Considerations

Taiyo Yuden lists substitutes for this obsolete part. Consult official documentation for direct replacements such as updated series members or equivalent specifications from other manufacturers if availability is critical.