The B12 BC series is available in the standard ATX form factor and in wattages commonly used for PC systems. The Seasonic B12 BC meets the 80 PLUS Bronze standard with at least 82%, 85%, and 82% energy efficiency at 20%, 50%, and 100% load, respectively. This efficiency, combined with Active Power Factor Correction, allows the B12 BC series power supplies to reduce energy waste, leading to savings on energy costs for users. The B12 BC units are not only highly efficient but also utilize LLC resonant converter design and industry-leading Smart and Silent Fan Control (S2FC).