BLM21PG121BH1D

Chip Ferrite Bead Overview

The Murata BLM21PG121BH1D is a single-line ferrite chip bead in the EMIFIL BLM21PG series, housed in an 0805 (2012 metric) surface-mount package. It provides an impedance of 120 Ohms at 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 1.55 A and features a maximum DC resistance of 30 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Chip Ferrite Bead Feature Summary

• AEC-Q200 qualified for automotive electronic applications
• High current handling capability up to 1.55 A
• Low DC resistance for minimal power loss
• Compact 0805 surface-mount footprint

Chip Ferrite Bead Applications

• EMI suppression filters in automotive circuits
• Power supply noise filtering
• Signal line protection in vehicle electronics

Chip Ferrite Bead Procurement Notes

Verify the suffix BH1D corresponds to the specific tape-and-reel packaging configuration required for your assembly process. Confirm that the AEC-Q200 qualification status meets your specific automotive grade requirements. Ensure the 1.55 A current rating aligns with your circuit's peak load conditions to prevent saturation or thermal issues during operation.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is critical alongside EMI suppression in space-constrained designs. The 0805 package offers a balance between current handling and board area efficiency. Consider the 120 Ohm impedance profile at 100 MHz to ensure effective attenuation of target noise frequencies without excessive signal degradation on power lines.

Chip Ferrite Bead Part Context

This part belongs to Murata’s BLM21PG series, designed specifically for automotive applications requiring robust performance under varying thermal conditions. The PG designation indicates high-current capabilities compared to standard BLM21 variants. It complements other components in power management and signal integrity networks within modern vehicle electronic control units.

Chip Ferrite Bead Replacement Considerations

BLM21PG121SN1D shares identical electrical specifications but differs in packaging suffix.