BLM31PG121SN1L

Chip Ferrite Bead Overview

The Murata BLM31PG121SN1L is a single ferrite chip bead in a 1206 (3216 metric) surface-mount package. It exhibits an impedance of 120 ohms with a 25% tolerance at a test frequency of 100 MHz. The component supports a maximum DC current of 3.5 A and features a maximum DC resistance of 20 milliohms. It operates within a temperature range of -55°C to +125°C, with physical dimensions of 3.2 mm length, 1.6 mm width, and 1.1 mm height.

Chip Ferrite Bead Feature Summary

• Functions as a resistor at noise frequencies to reduce resonance possibilities
• Maintains signal waveform integrity during EMI suppression
• Designed for high-current power line applications

Chip Ferrite Bead Applications

• Power supply circuits
• EMI suppression in electronic circuits
• High-current power lines

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1L against official Murata documentation to confirm packaging type and compliance status. Ensure the selected variant matches the required impedance tolerance and current rating for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and availability before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring significant current handling capability alongside effective high-frequency noise attenuation. The low DC resistance minimizes voltage drop and power loss in power delivery paths. Consider the 1206 footprint constraints and thermal management requirements associated with 3.5 A continuous operation when integrating into the PCB layout.

Chip Ferrite Bead Part Context

This component belongs to the BLM31PG series of multilayer chip ferrite beads from Murata Electronics. The series is engineered for electromagnetic interference suppression in compact electronic devices. These beads utilize specialized ferrite materials to provide stable impedance characteristics across varying temperatures and current loads.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.