BLM21SP181SN1D

Chip Ferrite Bead Overview

The Murata BLM21SP181SN1D is a single-line ferrite bead chip designed for electromagnetic interference suppression in power supply circuits. It features an 0805 (2012 metric) surface-mount package with dimensions of 2.00mm length, 1.25mm width, and a maximum height of 1.05mm. The component provides an impedance of 180 Ohms at a test frequency of 100 MHz and supports a maximum DC current rating of 4A. It operates within a temperature range of -55°C to +125°C and complies with RoHS3 standards.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation for single power lines through ferrite material properties.
• Engineered for high-current applications with a rated capacity of 4A to support robust power delivery.
• Utilizes a compact 0805 surface-mount footprint to facilitate automated assembly and space-constrained PCB layouts.

Chip Ferrite Bead Applications

• Electromagnetic interference suppression filters
• Power supply circuit filtering

Chip Ferrite Bead Procurement Notes

Verify the specific ordering suffix against official Murata documentation to ensure correct impedance and tolerance specifications. Confirm that the selected packaging format aligns with manufacturing requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current product status before finalizing procurement decisions.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring 180 Ohms impedance at 100 MHz for single-line power paths. Ensure the design accommodates a 4A current rating and fits within the 0805 spatial constraints. Verify thermal management capabilities for operation up to 125°C. Consider alternative series if higher current handling or different impedance characteristics are required.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM21 series of ferrite beads. The series offers various impedance values and current ratings within standardized packages. The BLM21SP181SN1D specifically addresses high-current power line filtering needs in consumer electronics and industrial equipment using the widely adopted 0805 form factor.

Chip Ferrite Bead Replacement Considerations

BLM41PG181SN1L is listed as an alternate sizing guide option by distributors, though it utilizes a larger 1806 package. Verify electrical compatibility and physical fitment before substitution.