BLM31KN471SN1L

Chip Ferrite Bead Overview

The Murata BLM31KN471SN1L is a single-line ferrite bead chip designed for power line noise suppression. It features an impedance of 470 Ohms at 100 MHz and supports a maximum DC current of 4A with a low DC resistance of 20 mOhms. The component utilizes a 1206 (3216 metric) surface-mount package, measuring 3.20mm x 1.60mm x 1.80mm. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation on power lines through high impedance characteristics.
• Capable of handling high continuous DC currents suitable for demanding power distribution applications.
• Automotive-grade reliability certified under the AEC-Q200 standard for harsh environment durability.

Chip Ferrite Bead Applications

• Noise filtering in AI server power supply circuits
• Electromagnetic interference suppression in automotive electronic systems
• Power line conditioning in industrial control equipment

Chip Ferrite Bead Procurement Notes

Verify the complete part number against official Murata documentation to ensure correct impedance and current ratings. Confirm that the specific suffix matches the required packaging format and tolerance specifications. Cross-reference the manufacturing date code to ensure compliance with current RoHS3 and REACH regulatory standards before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is required alongside significant noise suppression in a standard 1206 footprint. The low DC resistance minimizes power loss and voltage drop across the filter. Ensure the application's operating temperature remains within the specified -55°C to +125°C range to maintain performance integrity.

Chip Ferrite Bead Part Context

This component belongs to the BLM31KN series, which focuses on high-rated current capabilities for surface mount applications. The series is engineered to meet the stringent requirements of modern electronics, including automotive and data center infrastructure, providing robust electromagnetic compatibility solutions.

Chip Ferrite Bead Replacement Considerations

Consult the official Murata datasheet for direct cross-references. Verify that any substitute maintains identical impedance curves, current ratings, and physical dimensions to ensure board compatibility and electrical performance equivalence.