BLM21SP111SH1D

Chip Ferrite Bead Overview

The Murata BLM21SP111SH1D is a surface-mount ferrite chip bead from the BLM21SP series, designed for electromagnetic interference suppression in power lines. It features an impedance of 110 Ohms at 100 MHz with a tolerance of 5%. The component supports a maximum DC current of 5A and has a maximum DC resistance of 13 mOhms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards. The device utilizes a 0805 (2012 metric) package with dimensions of 2.0mm length, 1.25mm width, and 0.85mm height.

Chip Ferrite Bead Feature Summary

• Functions as a resistor at noise frequencies to reduce resonance possibilities
• Maintains signal waveform integrity during high-frequency noise suppression
• Qualified for automotive applications under AEC-Q200 standards

Chip Ferrite Bead Applications

• Power line noise filtering in automotive electronics
• Electromagnetic interference suppression in embedded systems
• High-current circuit protection in compact form factors

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D against official Murata documentation to confirm packaging type and tape-and-reel specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target application. Cross-reference the AEC-Q200 certification status if automotive compliance is mandatory. Confirm RoHS and REACH compliance details through the manufacturer's latest datasheet before finalizing procurement.

Chip Ferrite Bead Selection Notes

Select this component when high current handling up to 5A is required alongside effective high-frequency noise attenuation. The 0805 footprint offers a balance between current capacity and board space efficiency. Consider the low DC resistance to minimize voltage drop in power delivery networks. Verify that the 110 Ohm impedance profile aligns with the specific noise frequency spectrum of the target circuit.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM21SP series of ferrite beads, which are engineered for robust performance in demanding environments. The series is characterized by its ability to function resistively at noise frequencies, thereby preventing resonance issues common in other filter types. The BLM21SP variants are specifically optimized for automotive and industrial applications requiring high reliability and thermal stability.

Chip Ferrite Bead Replacement Considerations

BLM21SP111SN1D is listed as a similar alternative within the same series.