BLA31BD102SN4D

Chip Ferrite Bead Overview

The BLA31BD102SN4D is a surface-mount ferrite bead array manufactured by Murata Electronics. It features four independent signal lines within a single package, designed for EMI suppression in high-speed data circuits. The component exhibits an impedance of 1 kOhms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 50 mA and has a maximum DC resistance of 550 mOhms. The device operates reliably within a temperature range of -55°C to +125°C. It utilizes a 1206 (3216 metric) footprint with eight PCB pads.

Chip Ferrite Bead Feature Summary

• Provides four-channel isolation for simultaneous noise filtering on multiple signal lines
• Engineered for effective electromagnetic interference suppression in dense circuit layouts
• Supports high-speed digital signal integrity through controlled impedance characteristics

Chip Ferrite Bead Applications

• High-speed serial data line protection
• USB interface noise filtering
• Display interface signal conditioning
• General-purpose EMI suppression in consumer electronics

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN4D against the manufacturer's official datasheet to confirm pin configuration and packaging type. Ensure the selected variant matches the required impedance tolerance and current rating for the target application. Cross-reference the part number with authorized distributors to confirm authenticity and compliance with current RoHS standards before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when multi-line noise attenuation is required in a compact form factor. The 1206 package offers a balance between thermal performance and board space efficiency. Consider the 50 mA current limit when designing power-sensitive circuits. Verify that the 1 kOhm impedance at 100 MHz aligns with the noise spectrum of the signals being filtered to ensure optimal attenuation without signal degradation.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLA series of chip ferrite bead arrays. The series is designed to replace discrete components, reducing assembly complexity and improving reliability in high-density printed circuit boards. The BLA31BD sub-series specifically targets applications requiring robust EMI suppression for multiple parallel signal traces within a standardized surface-mount footprint.

Chip Ferrite Bead Replacement Considerations

BLA31AG102SN4D is a confirmed parameter-equivalent substitute from Murata Electronics.