The Siemens 6SL3520-1XA63-0AF0 is the full-featured AF0 variant of the SINAMICS G115D at 3 kW (4 hp, 7.7 A) in the FSB fanless frame — the highest-power G115D that operates without a cooling fan. It combines PROFINET/EtherNet/IP, a local remote panel, and daisy-chain power and communication connectors in a passively cooled enclosure, making it a unique combination: full interface capability with zero fan noise and zero fan maintenance.

Why 3 kW fanless is a sweet spot for daisy-chain

At 3 kW, the G115D drives medium-duty conveyors — transfer cars, lift stations, longer belt sections — that often cluster in groups of 3–6 along a line. The AF0 daisy-chain topology eliminates individual power drops and Ethernet switches, while the fanless design means no moving parts to maintain across the entire group. For food & beverage or pharmaceutical conveyor lines where fan-driven airflow is undesirable, the 3 kW AF0 delivers full daisy-chain convenience in a sealed, passive-cooled package.

Frequently Asked Questions

Is the 3 kW FSB the same size as the 4 kW FSB?

No. The 3 kW FSB is fanless — 425 × 180 × 134 mm (7.12 kg). The 4 kW FSB adds a fan, increasing depth to 169 mm (7.85 kg). Width and height are identical. Both share the same mounting pattern, so upgrading from 3 kW to 4 kW requires only the additional 35 mm depth clearance.