BLM15BD121SN1D

Chip Ferrite Bead Overview

The Murata BLM15BD121SN1D is a single-line ferrite chip bead in the BLM15 series, designed for EMI suppression. It features a 0402 (1005 metric) SMD package with dimensions of 1.0 mm length, 0.5 mm width, and 0.5 mm height. The component provides an impedance of 120 Ohms at 100 MHz with a tolerance of 25%. It supports a maximum DC current of 300 mA and has a maximum DC resistance of 0.3 Ohms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise filtering for signal lines without requiring a ground connection.
• Features a nickel barrier layer on external electrodes to ensure excellent soldering heat resistance.
• Designed to minimize resonance possibilities and prevent signal distortion in GHz frequency applications.

Chip Ferrite Bead Applications

• EMI suppression filters for power supplies
• Noise suppression for data lines in portable devices
• Prevention of errors caused by local oscillator signals in mobile phones

Chip Ferrite Bead Procurement Notes

Verify the specific electrical parameters against the official datasheet, particularly noting the discrepancy between the Mouser listing (1.3A) and other sources (300mA/0.3 Ohm). Confirm the exact package dimensions and RoHS compliance status prior to ordering. Ensure the selected variant matches the required current rating for the target circuit application.

Chip Ferrite Bead Selection Notes

Select this component for compact EMI suppression in low-current signal paths where grounding is unavailable. The 0402 footprint suits space-constrained designs. Evaluate the trade-off between the 120 Ohm impedance and the current handling capability to ensure it meets the specific line requirements without saturation.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM15 series of multi-layer ferrite beads. These components are engineered for suppressing high-frequency noise in GHz bands. The series offers various impedance values and current ratings within standard EIA sizes, providing a versatile solution for noise control in consumer electronics and industrial equipment.

Chip Ferrite Bead Replacement Considerations

Check for direct substitutes within the BLM15 series or equivalent offerings from other manufacturers that match the 120 Ohm impedance, 0402 package, and current rating specifications. Ensure any replacement maintains the same thermal and mechanical characteristics.