The 6SL3520-0XB05-5AF0 is the entry point to the FSC power stage — 5.5 kW in a frame that shares the same 425 × 180 × 169 mm footprint as the fan-cooled FSB, but with higher-rated IGBTs for the increased power output (only 330 g heavier at 7.85 kg vs 7.52 kg). Rated for 13.2 A continuous output (HO) at 380–480 V three-phase with 200% overload for 3 seconds. B-connector with PROFINET and PROFIsafe for STO over the same Ethernet cable. Compatible with IE2/IE3/IE4 motors across 0–550 Hz, IP65 sealed.

What makes FSC different from FSB fan-cooled?

FSC and fan-cooled FSB share the same 425 × 180 × 169 mm enclosure and integrated fan — mechanically, they are the same physical package. The difference is the power semiconductor rating: FSC uses higher-current IGBTs sized for 5.5–7.5 kW operation (13.2–19 A HO), while FSB fan-cooled is rated up to 4 kW (10.2 A HO). The 330 g weight difference (7.85 vs 7.52 kg) reflects the larger power stage components. For the installation footprint and mounting dimensions, FSB fan-cooled and FSC are interchangeable — the upgrade path from 4 kW to 5.5 kW requires no mechanical redesign.