The 6SL3520-0XK03-0AF0 occupies the 3 kW mid-point of the G120X wall-mounted FSB range, delivering 15.4 A with the full-featured -0AF0 I/O and communication configuration. At 134 mm deep, it shares the shallower enclosure with the 2.2 kW variant — the extra current headroom comes from a higher-rated power stage within the same 425 × 240 mm footprint, making it the sweet spot for installations that need a step above entry-level without the 169 mm depth of the 4 kW unit.

Where does the 3 kW variant fit in the G120X FSB power ladder?

The FSB frame spans 1.5 to 4 kW across four power nodes. The 3 kW / 15.4 A variant is the upper-mid option — it covers the most common IEC motor sizes in building services (3 kW supply and return fans, 3 kW chilled-water pumps, 3 kW cooling-tower fans) without the extra depth and cost of the 4 kW unit. It provides a 30% current margin over the 2.2 kW variant at 11.8 A, which can be decisive when motor nameplate current sits above 12 A.

What overload performance does this drive offer for pump and fan duty?

The drive supports a three-tier variable-torque overload profile: 200% for 3 seconds to clear momentary blockages, 150% for 57 seconds for demand surges, and 87% for 240 seconds for continuous reduced-speed operation. This profile is engineered for centrifugal loads where torque varies with the square of speed — typical of HVAC pumps, cooling-tower fans, and air-handling units.

Frequently Asked Questions

Can the 3 kW variant run a 4 kW motor if the actual load never exceeds 3 kW?

No. The drive must be sized to the motor's full-load current rating, not the anticipated operating load. A 4 kW IEC motor at 480 V typically draws more than 15.4 A at full load — select the 4 kW / 20.4 A variant instead.

What is the maximum motor cable length without an output reactor?

All G120X variants support motor cable runs up to 150 metres without an additional output reactor, covering most distributed pump and fan installations.