What this commutating choke does in a drive line
The Siemens 4EU4321-0CA10-0A is a 3-phase commutating choke for converters, rated 400V AC at 50Hz. It handles a maximum current of 1600A and a rated continuous current of 1440A, with a DC-rated value of 1960.7A. The 0.014 mH inductance and 4% relative inductive voltage drop limit the rate of current rise during commutation, protecting the converter's semiconductors from di/dt stress. This is the part that sits between the line supply and the converter input in a high-current drive system — think large pumps, conveyors, or compressors on a 400V plant network.
Thermal and mechanical constraints for panel integration
The choke measures 0.435m high by 0.46m wide by 0.265m deep — a substantial block that needs floor or heavy shelf mounting, not a DIN rail. IP00 means no enclosure protection; it requires a cabinet with forced ventilation or derating if ambient exceeds 40°C. Total power loss is 980W (650W coil + 330W iron core), so the panel cooling budget must account for nearly a kilowatt of heat rejection. Class H insulation (180°C) gives headroom for overload cycles, but the 40°C ambient rating is the design point for continuous duty.
Lifecycle status is mature. No official successor issued. Flat-type terminals for high-current connection. Sourced to order against RFQ.