BLM21HE802SH1L

Chip Ferrite Bead Overview

The BLM21HE802SH1L is a single-line ferrite bead from Murata's BLM series, designed for noise suppression in high-speed digital circuits. It features an 800 ohm impedance at 100 MHz and a rated current of 300 mA. The component utilizes a compact 0805 (2012 metric) surface-mount package with a height of 0.6 mm. Key electrical characteristics include a DC resistance of 0.45 ohms maximum and a self-resonant frequency of 1.5 GHz minimum. These specifications ensure effective attenuation of high-frequency electromagnetic interference while maintaining signal integrity in space-constrained applications.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise suppression through ferrite material properties
• Compact low-profile design suitable for dense PCB layouts
• Single-line configuration for targeted circuit protection

Chip Ferrite Bead Applications

• Portable electronic devices requiring EMI reduction
• High-speed data lines in consumer electronics
• Power supply filtering for sensitive ICs

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffixes to ensure correct impedance and tolerance specifications. Confirm package dimensions and termination plating options match your assembly requirements. Check RoHS compliance status if required by your manufacturing standards. Ensure storage conditions adhere to manufacturer guidelines to maintain component reliability before soldering.

Chip Ferrite Bead Selection Notes

Select this component based on its specific impedance curve at target frequencies rather than just nominal values. Consider the DC bias current rating to prevent saturation effects in your circuit. Evaluate the physical size constraints against the available board space. Compare thermal performance requirements with the component's power dissipation capabilities under operating conditions.

Chip Ferrite Bead Part Context

This ferrite bead belongs to Murata's BLM series, which offers various line configurations and impedance levels. The HE suffix indicates a specific product line optimized for certain performance characteristics. Similar components exist in the BLM series with different impedance ratings and current capacities. The 0805 package is common across many surface-mount passive components for standardization.

Chip Ferrite Bead Replacement Considerations

Direct replacements must match the 800 ohm impedance at 100 MHz and 300 mA current rating. Verify that substitute components have compatible DC resistance and self-resonant frequency specifications. Ensure the replacement fits within the same 0805 footprint and height constraints. Check that the alternative part meets the same environmental and reliability standards.