The Siemens 6SL3520-1XB40-3AF0 is the absolute lowest power rating in the SINAMICS G115D wall-mounted distributed drive family — 0.37 kW (0.5 hp) with PROFINET/EtherNet/IP in the compact FSA frame (380 × 156 × 129 mm). With 1.3 A rated output (High Overload), 380–480 V 3-phase supply, B-connector, and integrated PROFIsafe SIL 2 safety, it extends the 1XB4x sub-series to the very bottom of the G115D power range — the smallest section on the conveyor line can now be a full PROFINET node.

Why PROFINET at 0.37 kW?

At 0.37 kW, this drive serves the very lightest conveyor functions — a singulation gate, a mini diverter wheel, a reject station. Integrating these into the PROFINET network alongside larger sections creates a unified engineering environment where every device — from 0.37 kW to 7.5 kW — appears in TIA Portal with the same parameter structure, diagnostic buffer, and conveyor technology function blocks. PROFIsafe travels on the same bus cable. The marginal cost of PROFINET at 0.37 kW is the smallest in the entire G115D range. For B-connector facilities, the 1XB40-3AF0 is the lowest-power way to put a Siemens distributed drive on the network.

What motor types are supported?

The drive delivers 1.3 A rated output current with 200% overload — 2.6 A for 3 seconds. Supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 0.37 kW. Control modes: V/f (0–550 Hz), V/f with FCC, sensorless vector control (0–240 Hz). Pulse frequency: 4–16 kHz. Integrated 180 V DC brake control. The integrated 2-port PROFINET switch supports daisy-chain line topology. FSA frame: natural convection cooling, no fan, IP66 / UL Type 4X.

Frequently Asked Questions

Is 0.37 kW sufficient for industrial conveyor duty?

Yes — for the right application. A 0.37 kW motor can drive a singulation gate, a small diverter wheel, a reject pusher, or a very light belt section handling packages under a few kilograms in e-commerce or pharmaceutical material handling. The key sizing question is whether the section's steady-state load and starting torque fit within the 1.3 A continuous / 2.6 A peak envelope. If the load is variable or the section starts under resistance, the 0.55 kW (1.7 A) variant provides additional headroom in the same FSA footprint.

How does this compare to the 0XD00-3AF0 at 0.37 kW?

Electrically identical — same 1.3 A rated / 2.6 A overload, same FSA frame, same PROFINET stack with PROFIsafe. The difference is the connector: 1XB40 uses B-type, 0XD00 uses D-type. Choose based on your facility's cable standard. The 1XB40 has the advantage of scaling within the B-connector family to 7.5 kW FSC via 1XB05/07.

Is an external braking resistor required?

The integrated 180 V DC brake chopper is more than sufficient at 0.37 kW. An external braking resistor is not required for any typical conveyor duty at this power level.