BLA31AG121SN4D

Chip Ferrite Bead Overview

The Murata BLA31AG121SN4D is a four-channel ferrite bead array in a 1206 (3216 metric) surface-mount package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 200 milliohms and a rated current of 150 mA. The component operates within a temperature range of -55°C to +125°C and features an eight-pad board configuration.

Chip Ferrite Bead Feature Summary

• Integrated four-channel design for simultaneous multi-line noise suppression
• Compact 1206 footprint optimized for high-density surface-mount layouts
• Low DC resistance characteristic to minimize signal attenuation

Chip Ferrite Bead Applications

• Noise filtering for audio line circuits
• EMI suppression in portable electronic devices
• Signal integrity protection in data transmission lines

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN4D against the manufacturer datasheet to confirm pinout and electrical tolerances. Ensure the ordering quantity aligns with standard packaging configurations, typically 4,000 units per reel, to match production requirements.

Chip Ferrite Bead Selection Notes

Select this component when multiple signal lines require compact EMI filtering within limited board space. The 150 mA rating suits low-current applications, while the 120 Ohm impedance targets specific frequency ranges. Confirm thermal stability requirements fall within the specified -55°C to +125°C operational window.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLA31 series, which specializes in chip ferrite bead arrays. These components are engineered for efficient electromagnetic interference suppression in compact consumer electronics and industrial equipment where space constraints necessitate integrated multi-channel solutions.

Chip Ferrite Bead Replacement Considerations

BLA3216A121SG4T1 serves as a documented alternate designation for this component. Verify mechanical dimensions and electrical parameters before substitution.