BLM31SN500SZ1L

Chip Ferrite Bead Overview

The Murata BLM31SN500SZ1L is a single-line ferrite bead in the EMIFIL BLM31 series, designed for high-current power line applications. It features a 1206 (3216 metric) surface-mount package with dimensions of 3.2 mm length, 1.6 mm width, and 1.1 mm height. The component provides an impedance of 50 Ohms at 100 MHz with a tolerance of 25%. It supports a maximum DC current of 12 A and has a maximum DC resistance of 1.6 mOhms. Operating temperatures range from -55°C to +125°C. It holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Engineered for high-current power line circuits utilizing low DC resistance characteristics
• Single-channel configuration suitable for compact surface-mount layouts
• Qualified for automotive electronic environments under AEC-Q200 standards

Chip Ferrite Bead Applications

• Automotive power distribution networks
• High-current signal filtering on printed circuit boards
• Noise suppression in automotive electronic control units

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official Murata documentation to confirm package dimensions and termination specifications. Ensure the procurement source provides valid AEC-Q200 certification records for automotive compliance. Cross-reference the impedance value at 100 MHz with system requirements. Confirm RoHS3 status if environmental regulations apply to the final assembly process.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring significant current handling capacity alongside noise attenuation. The low DC resistance minimizes voltage drop across the filter in high-amperage paths. Verify that the 12A rating aligns with peak load conditions. Consider the 1206 footprint constraints during layout planning to ensure adequate thermal dissipation and mechanical stability.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM31SN series, which specializes in ferrite beads for power lines. The series is characterized by its ability to handle large currents while maintaining effective electromagnetic interference suppression. It serves as a critical passive component in modern electronics where space efficiency and high current capacity are mandatory design parameters.

Chip Ferrite Bead Replacement Considerations

Consult the official Murata downsizing guide or equivalent technical resources for verified substitute part numbers. Do not assume functional equivalence based solely on package size or nominal impedance values without checking current ratings and DC resistance specifications.