BLM21SP181SZ1D

Chip Ferrite Bead Overview

The Murata Electronics BLM21SP181SZ1D is a single-line ferrite bead chip designed for power line noise suppression. It operates within the EMIFIL BLM21 series and features an impedance of 180 Ohms at 100 MHz. The component supports a maximum DC current rating of 4A and functions reliably across a temperature range of -55°C to +125°C. Housed in a compact 0805 (2012 metric) surface-mount package, it measures 2.00mm x 1.25mm with a maximum height of 1.05mm. This device meets AEC-Q200 automotive qualification standards and complies with RoHS3 regulations.

Chip Ferrite Bead Feature Summary

• Provides effective electromagnetic interference suppression on power lines through high-impedance characteristics at target frequencies.
• Engineered for high-current applications with a rated capacity of 4A, suitable for demanding power distribution networks.
• Automotive-grade reliability confirmed by AEC-Q200 qualification, ensuring stability under rigorous environmental conditions.

Chip Ferrite Bead Applications

• Noise filtering in automotive electronic control units
• Power supply input stages in industrial equipment
• EMI suppression for high-current digital logic circuits

Chip Ferrite Bead Procurement Notes

Verify the suffix 'SZ1D' against official Murata documentation to confirm specific tolerance and packaging variations. Ensure the selected variant matches the required impedance tolerance and reel specifications for your assembly process. Cross-reference the full part number with the manufacturer's latest datasheet to validate availability and compliance status before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring robust power line filtering with high current handling capabilities. The 0805 footprint offers a balance between thermal performance and board space efficiency. Consider the 4A rating to ensure the device does not saturate or overheat during peak load conditions. Verify that the 180 Ohm impedance at 100 MHz aligns with the specific noise frequency spectrum present in the target application environment.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21SP series, which specializes in high-current ferrite beads for power applications. The series is widely utilized in automotive and industrial sectors where reliable EMI suppression is critical. The BLM21SP designation indicates a specific material composition optimized for power line noise reduction while maintaining low DC resistance to minimize power loss.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Consult Murata's official substitution guide or SimSurfing tool for verified alternatives that match electrical and mechanical specifications.