BLM31PG500SZ1L

Chip Ferrite Bead Overview

The Murata BLM31PG500SZ1L is a single-line ferrite bead chip designed for electromagnetic interference (EMI) suppression in power lines. 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 a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 3.5 A and has a maximum DC resistance of 15 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Designed for EMI noise suppression on continuous voltage lines without requiring a ground connection.
• Features a nickel barrier structure on external electrodes to provide excellent thermal resistance during soldering.
• Functions as a resistor at noise frequencies to maintain signal waveform integrity and reduce resonance risks.

Chip Ferrite Bead Applications

• Electromagnetic interference filtering for automotive electronic circuits
• Noise suppression on single power supply lines
• Signal conditioning in general-purpose electronic applications

Chip Ferrite Bead Procurement Notes

Verify the specific suffix code against official Murata documentation to confirm exact impedance and current ratings, as variations exist within the BLM31 family. Confirm RoHS compliance status and AEC-Q200 automotive qualification requirements prior to integration. Ensure the selected packaging format matches production line capabilities, as options include reel, cut tape, and specialized handling formats.

Chip Ferrite Bead Selection Notes

Select this component when a low-impedance path is required for high-current power lines needing moderate high-frequency attenuation. The 1206 footprint offers a balance between current handling capacity and board space efficiency. Consider the 15 mOhm DC resistance impact on voltage drop for the target 3.5 A load. Verify that the 50 Ohm impedance at 100 MHz aligns with the specific noise spectrum of the application.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM_P series of ferrite beads. The series is characterized by high current capability and stability in automotive environments. The BLM31 designation indicates the 1206 case size, while the PG suffix typically denotes specific material properties or tolerance grades within the manufacturer's catalog structure.

Chip Ferrite Bead Replacement Considerations

BLM31PG500SN1L is listed as a parameter-equivalent alternative from Murata Electronics.

Chip Ferrite Bead FAQ

Does the BLM31PG500SZ1L require a ground connection for operation?

No, this ferrite bead is designed to function on continuous voltage lines without requiring a ground connection.

What is the maximum DC current rating for this component?

The maximum DC current rating is 3.5 A.