The Siemens 6SL3520-0XB43-0AF0 is the PROFINET/EtherNet/IP communication variant in the 0XB connector system of the SINAMICS G115D wall-mounted distributed drive family, rated at 3 kW — the highest fanless power rating — in the FSB fanless frame (425 × 180 × 134 mm, 7.12 kg). With 7.7 A rated output (High Overload), 380–480 V 3-phase supply, B-connector, and integrated PROFIsafe SIL 2 safety, it extends the 0XB system into the FSB fanless power class, parallel to the 1XB43-0AF0 and 0XC03-0AF0.

0XB at 3 kW fanless

The 0XB43 confirms the 0XB code system at the highest fanless G115D power rating. Natural convection cooling — no fan, zero drive-generated noise, no fan bearing to wear. Electrically and mechanically identical to 1XB43-0AF0 (B-connector, "1X" prefix) and functionally equivalent to 0XC03-0AF0 (C-connector). For B-connector facilities, the 0XB43-0AF0 is the 3 kW PROFINET option in the 0XB catalog path.

What motor types are supported?

The drive delivers 7.7 A rated output current with 200% overload — 15.4 A for 3 seconds. Supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 3 kW. Control modes: V/f (0–550 Hz), V/f with FCC, sensorless vector control (0–240 Hz). Integrated 180 V DC brake control. 2-port PROFINET switch with daisy-chain and MRP ring support.

Frequently Asked Questions

Is an external braking resistor required?

At 3 kW, an external braking resistor (minimum 130 Ω for FSB) is recommended for decline conveyors or high-inertia loads with frequent stops. For horizontal conveyors, the internal brake management is typically sufficient.