BK2125HM471-T

Overview

The BK2125HM471-T is a multilayer ferrite chip bead manufactured by Taiyo Yuden in an 0805 (2012 metric) surface-mount package. It provides an impedance of 470 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 500 mA and has a maximum DC resistance of 250 mOhms. It operates within a temperature range of -55°C to +125°C.

Feature Summary

• Multilayer construction for compact high-frequency noise suppression
• Designed for surface-mount assembly on printed circuit boards
• Provides specific impedance characteristics at 100 MHz

Applications

• High-speed data line filtering
• Power supply noise suppression
• EMI/RFI attenuation in portable devices

Procurement Notes

This component is officially discontinued and no longer manufactured by Taiyo Yuden. Verification of availability should focus on existing stock from authorized distributors or secondary market suppliers. Buyers must confirm the authenticity and storage history of available units, as lead times and stock levels are subject to change without notice. Cross-referencing with approved substitute part numbers is recommended for new designs.

Selection Notes

Selection requires verifying that the 470 Ohm impedance at 100 MHz meets the target noise spectrum requirements. The 500 mA current rating must exceed the maximum operating current of the protected circuit to prevent saturation. The 0805 footprint compatibility must be confirmed against the PCB layout. Since the part is obsolete, alternative components with identical electrical parameters and mechanical dimensions should be evaluated for long-term supply stability.

Part Context

The BK2125HM471-T belongs to the BK series of multilayer ferrite beads from Taiyo Yuden. These components utilize proprietary ceramic materials to achieve high impedance in a small form factor. The series is designed for suppressing electromagnetic interference in digital circuits. This specific model represents a standard impedance value within the 0805 package size family.

Replacement Considerations

Direct substitutes include MH2029-471Y and MU2029-471Y from Bourns Inc. These alternatives offer matching 470 Ohm impedance specifications and similar physical dimensions.