BLM15BX121SN1D

Chip Ferrite Bead Overview

The Murata BLM15BX121SN1D is a single-line ferrite bead in a 0402 (1005 metric) surface-mount package. It provides an impedance of 120 Ohms at 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 600 mA and has a maximum DC resistance of 170 mOhms. It operates within a temperature range of -55°C to +125°C. Physical dimensions are 1.0 mm in length, 0.5 mm in width, and 0.5 mm in height.

Chip Ferrite Bead Feature Summary

• Compact 0402 footprint designed for space-constrained signal line filtering applications
• High current handling capability relative to its small physical size
• Low DC resistance minimizes voltage drop in power distribution paths

Chip Ferrite Bead Applications

• Signal line noise suppression in portable electronic devices
• EMI filtering on high-speed data lines
• Power supply input filtering for low-current circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against the manufacturer's latest datasheet to confirm packaging details and compliance status. Ensure the selected variant matches the required current rating of 600 mA for the target application circuit. Cross-reference the impedance specification at 100 MHz to validate EMI performance requirements.

Chip Ferrite Bead Selection Notes

Select this component when a 0402 package is mandatory and the circuit requires 120 Ohms of impedance at 100 MHz. The 600 mA current rating distinguishes it from lower-current variants like the BLM15AX series. Verify that the 170 mOhm DC resistance meets the system's power loss constraints.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM15 series of chip ferrite beads. The BX designation indicates a specific material composition optimized for broadband noise absorption. It is distinct from the PD and PX series which offer higher current ratings but may have different impedance characteristics or resistance values.

Chip Ferrite Bead Replacement Considerations

BLM15EX121SN1D offers similar impedance but higher current capacity (1.8 A). BLM15PD121SN1D provides intermediate current handling (1.3 A). Direct substitution requires verifying if the increased current rating fits the board layout and if the slightly different DC resistance affects circuit operation.