Active AEC-Q200 ferrite bead for signal-line filtering
The Murata BLM15GA750SZ1D is an active-production ferrite bead from the BLM series, qualified to AEC-Q200 for automotive applications. It provides 75 Ohms impedance at 100 MHz on a single signal line, rated for 200 mA continuous current with a maximum DC resistance of 1.3 Ohm.
75 Ohm impedance and 200 mA current handling
The 75 Ohm impedance at 100 MHz targets suppression of switching noise from nearby DC-DC converters or digital buses in the 100 MHz band. Maximum DC resistance of 1.3 Ohm introduces a voltage drop of 260 mV at full rated current — budget this into the rail tolerance if the bead is placed on a power line rather than a signal trace.