The 6SL3520-1XC03-0AF0 is the debut of 1XC03 — the 1XC C-connector SINAMICS G115D at 3 kW FSB fanless, extending the "1X" prefix C-connector family into the highest fanless G115D power rating. It delivers 7.7 A HO (15.4 A LO) in the fanless FSB enclosure (425 × 180 × 134 mm, 7.12 kg) with natural convection cooling — no integrated fan required. AF0 provides PROFINET IO with PROFIsafe and EtherNet/IP support via the integrated 2-port switch, designated for SIMATIC control systems. Operates at 380–480 V three-phase, compatible with IE2/IE3/IE4 motors across 0–550 Hz, IP65 sealed.

Why 3 kW FSB fanless matters in the 1XC family

3 kW is the highest G115D power rating achievable with natural convection — above this, 4 kW requires an integrated fan (FSB fan-cooled, 425 × 180 × 169 mm). The fanless FSB at 3 kW consumes only 250–290 mA from the 24 V DC control supply vs 510–550 mA for fan-cooled variants — a meaningful difference in control panel power budgeting when multiple drives share a single 24 V supply. For SIMATIC-controlled machines with 3 kW motor zones, 1XC03 delivers C-connector convenience, PROFINET networking, and fanless simplicity in one package. It parallels 0XC03 (0X prefix), XH23/XN03/XM03 (0XH), XE03/XE43 (XE), and 1XA03/1XA23 (1XA) — the same 3 kW fanless FSB hardware across eight parallel catalog codes.