Mains choke for frequency converters
The Siemens 4EU4351-2UB00-0A is a 3-phase mains choke (line reactor) designed for variable-frequency drive input circuits. Thermal class H (180 °C) insulation per IEC 60085 gives headroom in warm cabinets; expect 660 W copper loss and 260 W iron loss at full load.
The 4EU4351-2UB00-0A is classified as mature in its lifecycle — meaning it's a stable, long-running catalog item, not recently introduced or flagged for discontinuation. It's UL and CSA recognized per EN 61558-2-20, so it carries the approvals needed for North American panel builds without a separate evaluation.
IP00 rating means no enclosure protection — this choke is designed for installation inside a cabinet, not exposed to washdown or dust. Dimensions: 0.435 m high, 0.46 m wide, 0.265 m deep. Main circuit connections use flat-type terminals (bus-bar style), so plan for bolted lugs rather than ring terminals. The 11 µH inductance and 2% impedance are typical for a line reactor matched to a 1440 A drive bus — verify the drive manufacturer's recommended impedance before wiring.