The 6SL3520-1XD01-5AB0 is the Standard I/O variant at 1.5 kW in 1XD01 — the D-connector SINAMICS G115D for SIMATIC control systems. It delivers 4.1 A HO (8.2 A LO) in the FSA compact frame (380 × 156 × 129 mm, ~4.7 kg) with natural convection cooling. 1.5 kW is the highest FSA power before the transition to FSB at 2.2 kW — making this the most powerful D-connector drive available in the compact FSA form factor. AB0 provides terminal-based Standard I/O control. Operates at 380–480 V three-phase, compatible with IE2/IE3/IE4 motors across 0–550 Hz, IP65 sealed.