BLM21PG121SN1D

Chip Ferrite Bead Overview

The Murata BLM21PG121SN1D is a single-line ferrite bead chip designed for power line noise suppression. It features a 0805 (2012 metric) surface-mount package with dimensions of 2.00mm length and 1.25mm width. The component provides an impedance of 120 Ohms at 100 MHz and supports a maximum rated current of 3A. Its maximum DC resistance is 30 milliohms, ensuring minimal voltage drop in high-current applications. Operating temperatures range from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides effective electromagnetic interference suppression on power lines through high-impedance characteristics at target frequencies.
• Engineered for high-current handling capabilities suitable for demanding power distribution networks.
• Constructed with robust materials to maintain performance across wide industrial temperature ranges.

Chip Ferrite Bead Applications

• EMI suppression filters for general electronic equipment power supplies
• Noise filtering in portable device power circuits
• Signal integrity protection in consumer electronics

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging type and tape specifications. 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 a 0805 footprint is required for power line filtering with a 3A current capacity. The 120 Ohm impedance at 100 MHz targets common noise frequencies in digital systems. Verify that the low DC resistance meets the system's power efficiency requirements.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21PG series, which specializes in high-current ferrite beads. The series offers various impedance values within the 0805 package, allowing designers to balance noise suppression performance against DC resistance and current handling needs for different power rail applications.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers include Pulse Electronics BBUP00201209121Y00 and Taiyo Yuden FBMH2012HM121-T. Verify electrical parameters such as impedance and current rating match the original design requirements before substitution.