BLM31PG391SH1L

Chip Ferrite Bead Overview

The Murata BLM31PG391SH1L is a single-line ferrite chip bead in the EMIFIL BLM31_SN series. It features a 1206 (3216 metric) SMD package with dimensions of 3.2 mm length, 1.6 mm width, and 1.1 mm height. The component provides an impedance of 390 Ohms at a test frequency of 100 MHz with a 25% tolerance. It supports a maximum DC current of 2 A and has a maximum DC resistance of 50 mOhms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides high impedance attenuation for noise suppression on power lines
• Designed for surface mount integration in compact electronic assemblies
• Constructed for stable performance across wide industrial temperature ranges

Chip Ferrite Bead Applications

• Power line noise filtering in portable devices
• EMI suppression in automotive electronics
• Signal integrity management in consumer hardware

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1L against project requirements to ensure correct impedance and packaging specifications. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Cross-reference the Mouser part number 81-BLM31PG391SH1L for accurate sourcing channels. Ensure compatibility with existing PCB footprints designated for 1206 components.

Chip Ferrite Bead Selection Notes

Select this component when 390 Ohms of impedance is required at 100 MHz for noise reduction. The 2 A current rating suits moderate power applications within the 1206 form factor. Consider the 50 mOhm DC resistance for minimal voltage drop impact. Evaluate thermal stability needs within the -55°C to +125°C operational window for harsh environments.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM31_SN series of ferrite beads. It shares the standard 1206 footprint with other variants like the BLM31PG500SN1L but differs in impedance characteristics. The series is designed for general-purpose EMI suppression in space-constrained surface mount designs.

Chip Ferrite Bead Replacement Considerations

The BLM31PG391SN1L serves as a functional substitute with identical electrical parameters. Verify package compatibility and lead availability before substitution.