BK0402HS121-T

Overview

The BK0402HS121-T is a ferrite chip bead manufactured by Taiyo Yuden, designed for surface-mount assembly in the 0402 (1005 metric) package. It provides an impedance of 120 Ohms at 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 1 A and exhibits a maximum DC resistance of 140 mOhms. It operates within a temperature range of -55°C to +125°C and complies with RoHS standards.

Feature Summary

• High-current capability suitable for power line filtering applications
• Compact 0402 footprint for dense PCB layouts
• Low DC resistance to minimize signal attenuation
• Automotive-grade reliability with AEC-Q200 qualification

Applications

• Power supply output filtering
• DC-DC converter noise suppression
• Battery charger circuit protection

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to discontinued status. Confirm lot traceability and RoHS compliance documentation prior to integration. Validate physical dimensions against current design specifications to ensure compatibility with existing footprints.

Selection Notes

Select this component when high current handling is required in a minimal 0402 package. Ensure the 120 Ohm impedance profile matches the target noise frequency spectrum. Verify that the 1 A current rating exceeds the peak operational load of the specific circuit branch to prevent saturation.

Part Context

This part belongs to the BK series of multilayer ferrite beads from Taiyo Yuden. It is specifically engineered for high-current applications where space constraints necessitate small form factors. The HS designation typically indicates high-surge or high-current variants within the product family.

Replacement Considerations

Direct substitutes include Murata BLM02BX151SN1D. Alternative options may be sourced from TDK or other manufacturers offering equivalent 0402 ferrite beads with comparable impedance and current ratings.