BLM21RK102SN1D

Chip Ferrite Bead Overview

The Murata BLM21RK102SN1D is a surface-mount ferrite chip bead from the EMIFIL BLM21 series, designed for high-frequency noise suppression in digital interfaces. It features an impedance of 1 kOhm at 100 MHz with a tolerance of 25%. The component operates within a temperature range of -55°C to +125°C and supports a maximum DC current of 200 mA. Its physical dimensions conform to the 0805 (2012 metric) package, measuring 2 mm in length, 1.25 mm in width, and up to 1.05 mm in height. The maximum DC resistance is specified at 500 mOhms.

Chip Ferrite Bead Feature Summary

• Engineered specifically for suppressing high-frequency noise in digital interface applications
• Provides effective electromagnetic interference filtering through monolithic ferrite construction
• Supports surface mount technology for automated PCB assembly processes

Chip Ferrite Bead Applications

• Digital interface noise suppression
• Electromagnetic interference filtering circuits
• High-speed signal line protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging configuration and material compliance. Ensure the selected variant matches the required impedance tolerance and current rating for the target circuit design before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring precise noise attenuation at 100 MHz for low-current digital signals. Evaluate the 200 mA current limit against peak load requirements to prevent saturation. Confirm that the 0805 footprint aligns with the board layout constraints and thermal management strategy.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM21 series of EMIFIL ferrite beads, which are widely used for EMI suppression in consumer electronics and industrial equipment. The RK sub-series denotes specific impedance characteristics optimized for general-purpose digital noise reduction within standard surface-mount packages.

Chip Ferrite Bead Replacement Considerations

Consult official Murata cross-reference guides for verified substitutes. Ensure any alternative maintains identical impedance values, current ratings, and package dimensions to preserve circuit performance.