The 6SL3520-2XB03-0AF0 is the PROFINET variant of the 3 kW FSB fanless G115D B-connector drive — the highest-power G115D cooled entirely by natural convection. At 7.7 A HO with 200% 3 s overload and a silent 425 × 180 × 134 mm enclosure, it suits conveyor sections installed in noise-sensitive environments — cleanrooms, assembly workstations, or retail distribution where fan noise and maintenance are unwelcome. The absence of a fan also eliminates a mechanical wear component, reducing service intervals.

What makes this the right choice over the 4 kW FSB variant?

Step up to 4 kW (2XB04) and the FSB frame gains an integrated fan, adding 35 mm of depth (169 mm vs 134 mm) and audible noise. If 3 kW covers the load — and many accumulation zones, belt curves, and incline sections fall within this rating — the fanless drive is quieter, slimmer, and mechanically simpler. The AF0 PROFINET variant adds networked safety via PROFIsafe and dual-port M12 switch for line-topology wiring, making it the natural choice for PROFINET-controlled conveyor systems.