1.8 kOhm suppression at 100 MHz for signal lines
The BLM15BD182SN1D is a single-line ferrite bead from Murata's EMIFIL®, BLM15 series, delivering 1.8 kOhms impedance at 100 MHz to suppress conducted EMI on signal traces.
Where it fits in the BOM
Use this ferrite bead on low-current digital signal lines — I2C, SPI, UART, or GPIO traces — where a 100 mA current ceiling is sufficient and 1.8 kOhms at 100 MHz knocks down high-frequency noise without distorting the signal edge. The 1.4 Ohm DCR means it is not suited for power rail filtering above 100 mA; for supply lines, step up to a higher-current rated bead in the same EMIFIL family.