The Siemens 6SL3520-1XA64-0AB0 is the AB0 variant of the SINAMICS G115D rated at 4 kW (5 hp, 10.2 A) in the FSB fan-cooled frame (425 × 180 × 169 mm). It bridges the gap between the compact fanless FSA range and the larger FSC frame, adding a local remote operator panel to the standard PROFINET/EtherNet/IP fieldbus. At 4 kW, the integrated cooling fan is required — passive convection is insufficient — but the enclosure retains full IP65/IP66 integrity.

Frequently Asked Questions

How does 4 kW FSB compare to 3 kW FSB fanless?

The 4 kW FSB is the first fan-cooled model in the G115D lineup. Below 4 kW (up to 3 kW), the FSB frame dissipates heat passively. At 4 kW and above, an integrated 24 V DC fan adds forced-air cooling, increasing the frame depth by 35 mm (from 134 mm to 169 mm). The fan is the only physical difference — same width, height, and mounting pattern.