BLA31AG221SN4D

Chip Ferrite Bead Overview

The BLA31AG221SN4D is a surface-mount ferrite bead array manufactured by Murata Electronics. It features four independent signal lines within a single 1206 (3216 metric) package, designed for compact EMI suppression applications. The component exhibits an impedance of 220 Ohms at a test frequency of 100 MHz and supports a maximum DC current rating of 150 mA. Its maximum DC resistance is specified at 250 milliohms. The device operates reliably across a temperature range of -55°C to +125°C and complies with RoHS3 standards.

Chip Ferrite Bead Feature Summary

• Integrates four independent filtering channels in a compact footprint
• Provides high-impedance attenuation for high-speed digital signals
• Supports low-current signal line protection with minimal insertion loss

Chip Ferrite Bead Applications

• High-speed data bus noise suppression
• Clock line EMI filtering
• USB interface signal conditioning
• General-purpose signal line protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN4D against official Murata documentation to confirm packaging configuration and tape-and-reel specifications. Ensure compatibility with standard SMT assembly processes for 1206 footprints. Cross-reference datasheet revisions to validate material compliance and lead-free status prior to procurement.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require multi-channel filtering in a 1206 package. The 150 mA current rating suits low-power signal lines rather than power delivery paths. Verify that the 220 Ohm impedance profile aligns with target noise frequencies around 100 MHz for effective attenuation without excessive signal degradation.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLA31 series of chip ferrite bead arrays. The series is engineered for EMI suppression in portable electronic devices and computer peripherals. The BLA31AG variant specifically denotes the 1206 case size with four isolated channels, offering a balance between filtering performance and board real estate efficiency.

Chip Ferrite Bead Replacement Considerations

BLA2AAG221SN4D serves as a parameter-equivalent alternative from Murata, though it utilizes a smaller 0804 package. Verify mechanical fit and thermal characteristics before substitution.