BK1005LL121-T

Overview

The Taiyo Yuden BK1005LL121-T is a multilayer chip bead inductor from the BK series, designed for EMI/RFI filtering. It features a 0402 (1005 metric) surface-mount package with dimensions of 1.00mm x 0.50mm and a maximum height of 0.55mm. The component provides an impedance of 120 Ohms at 100 MHz with a tolerance of 25%. It has a maximum DC resistance of 330 milliohms and a rated current of 350mA. The operating temperature range is -55°C to 125°C. This single-line ferrite bead is RoHS compliant and classified under ECCN EAR99.

Feature Summary

• Multilayer construction for compact EMI suppression
• High impedance performance at 100 MHz
• Wide operating temperature stability

Applications

• EMI/RFI noise reduction in electronic circuits
• Power line filtering applications
• Signal integrity enhancement in high-frequency designs

Procurement Notes

Verify component status as obsolete or limited supply through authorized distributors. Confirm RoHS3 compliance and MSL level 1 handling requirements. Check for PCN notifications regarding product changes or discontinuation. Ensure compatibility with existing PCB footprints and reflow soldering profiles.

Selection Notes

Select this component for space-constrained designs requiring effective high-frequency noise attenuation. Consider the 350mA current rating and 330 milliohm DCR for power efficiency. Evaluate thermal performance within the -55°C to 125°C range. Compare against similar BK series parts for alternative impedance or current specifications if needed.

Part Context

Part of the Taiyo Yuden BK series multilayer chip bead inductors. Designed for surface-mount technology in consumer and industrial electronics. Provides reliable electromagnetic interference suppression in small form factors.

Replacement Considerations

Public confirmed substitutes include BKP1005TS121-T and BKP1005HS121-T. Verify electrical parameters and package compatibility before substitution.