75 Ω at 100 MHz, 200 mA continuous — the three numbers that define fit
The BLM15GA750SN1D is a single-line signal ferrite bead from Murata's EMIFIL BLM15 series, packaged in the 0402 (1005 Metric) footprint. Its 75 Ω impedance at 100 MHz is the suppression target for conducted noise in the 100 MHz band — typical for clock lines, data buses, and RF bias feeds where a low-Q filter knocks down harmonics without distorting the signal edge. Rated for 200 mA continuous current with a maximum DC resistance of 1.3 Ω. The 1.3 Ω DCR means a 200 mA load drops 260 mV across the bead and dissipates about 52 mW — well within the 0402 body's thermal budget at 85°C ambient, but worth checking if the trace carries both DC bias and a high-frequency signal where the voltage drop eats into the noise margin. The 0402 package keeps the mounting footprint small enough for dense PCB layouts where every square millimeter counts.