BLM15AX121SN1D

Chip Ferrite Bead Overview

The Murata BLM15AX121SN1D is a single ferrite chip bead in the BLM15_SN series, designed for surface mount applications. It features a 0402 (1005 metric) package with dimensions of 1 mm length, 0.5 mm width, and 0.5 mm height. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.1 A and has a maximum DC resistance of 0.13 Ω. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Designed for EMI suppression in high-frequency signal lines
• Single-layer construction suitable for low-impedance circuits
• Nickel barrier layer on external electrodes ensures soldering heat resistance

Chip Ferrite Bead Applications

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

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging 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 compact 0402 footprint is required for noise filtering in space-constrained designs. The 120 Ohm impedance at 100 MHz makes it suitable for suppressing interference in digital signal lines. Verify that the 1.1 A current rating meets the circuit's operational requirements without excessive self-heating.

Chip Ferrite Bead Part Context

This part belongs to the BLM15_SN family of EMIFIL ferrite beads. These components are engineered to minimize resonance risks and prevent signal distortion. They operate effectively without requiring a ground connection, making them versatile for various circuit topologies where grounding is unstable or unavailable.

Chip Ferrite Bead Replacement Considerations

Cross-reference with other BLM15 series variants such as BLM15EG121SN1D or BLM15PD121SN1D if different current ratings or DC resistance values are needed. Ensure any substitute maintains the same 0402 package dimensions and impedance characteristics.