Impedance and current rating for signal-line suppression
The BLM15HD102SZ1D delivers 1 kOhms impedance at 100 MHz, sized for suppressing conducted EMI on a single signal or power line in the 0402 footprint. Rated for 250 mA continuous current with a maximum DC resistance of 1.25 Ohm — the voltage drop at full load is about 312 mV, which matters when the bead sits on a low-voltage rail feeding a sensor or MCU supply.
Automotive temperature range and qualification
The BLM series is Murata's general-purpose ferrite bead family; this variant is explicitly marked for automotive use, meaning the lot traceability and reliability screening match production-vehicle requirements.