BLM31KN102SZ1K

Chip Ferrite Bead Overview

The Murata BLM31KN102SZ1K is a single-channel ferrite chip bead designed for power line noise suppression. It features a 1206 (3216 metric) surface-mount package with dimensions of 3.2 mm length, 1.6 mm width, and a maximum height of 1.80 mm. The component provides an impedance of 1 kOhms at a test frequency of 100 MHz. It supports a maximum DC current of 2 A and has a maximum DC resistance of 75 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Provides high-impedance attenuation for power lines to suppress electromagnetic interference.
• Engineered for high-current applications with low DC resistance to minimize voltage drop.
• Automotive-grade reliability certified under the AEC-Q200 standard.

Chip Ferrite Bead Applications

• Power supply filtering in automotive electronic control units
• Noise suppression on DC power input lines
• EMI mitigation in AI server power distribution networks

Chip Ferrite Bead Procurement Notes

Verify the suffix 'SZ1K' against official Murata documentation to confirm specific packaging and tape-and-reel specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target circuit design before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when high impedance is required for power line filtering in space-constrained designs. The 1206 footprint allows for compact PCB layouts while handling significant current loads. Verify that the 1 kOhm impedance value effectively targets the specific noise frequencies present in the application environment.

Chip Ferrite Bead Part Context

This part belongs to the BLM31KN series, which consists of high-rated current SMD ferrite beads. The series is specifically marketed for use in demanding environments such as AI servers and automotive systems, offering robust performance compared to standard ferrite beads.

Chip Ferrite Bead Replacement Considerations

Check for direct substitutes within the BLM31KN family with matching 1206 footprints and similar impedance characteristics. Ensure any replacement maintains the same AEC-Q200 qualification if automotive compliance is required.