The Siemens 6SL3200-6AE21-0AH0 is a SINAMICS G120P line filter, Filter Class A, sized for a 4 kW drive output on a 400 V supply. It sits between the mains and the drive's Power Module to attenuate conducted EMI back onto the line, keeping the installation within EN 61800-3 emission limits for the first environment (restricted distribution) or second environment (industrial).
Rated output current is 10.2 A at 400 V, 50/60 Hz — that governs the maximum motor current the filter can support continuously. The overload profile (110 % for 57 seconds, 150 % for 3 seconds, every 300 seconds) matches the SINAMICS G120P's own overload capability, so the filter won't be the thermal bottleneck during a high-start-torque or short-duration overload event. Filter Class A means it's the standard emissions filter for most industrial installations. If your site requires Class B (residential / light commercial), this filter won't meet the tighter limits — you'd step to a different G120P filter variant.
Communication and fieldbus options — Modbus/RTU, RS485/USS, BACnet MS/TP, and optional PROFIBUS, PROFINET, or CANopen — are features of the drive controller itself, not the filter. The filter is passive; these protocols tell you which G120P Control Unit this filter is paired with in a typical build.
Siemens lists this part as Active (mature lifecycle stage). Carries CE, UL, EAC, and RCM conformity marks — covers European, US, Eurasian, and Australian regulatory jurisdictions. Standard EN 61800-3 is the adjustable-speed drive EMC product standard; this filter is the means by which a G120P drive system meets that standard's conducted emission limits.