The Siemens 4EU2722-0GC00-1BA0 is a three-phase mains choke (Netzdrossel) rated for 150 A maximum current and 135 A continuous rated current at 500 V AC, 50 Hz. The 0.3 mH inductance limits harmonic distortion and reduces peak currents on the input side of a variable-frequency drive or rectifier. The 156 W coil loss plus 73 W iron core loss (229 W total at rated conditions) is the heat you need to vent; IP00 means this is an open-frame component for cabinet mounting, not a standalone enclosure.
Where it fits — panel integration and thermal class
This choke measures 0.27 m wide, 0.248 m high, and 0.187 m deep — a compact footprint for a 150 A three-phase reactor. The flat-connector main terminals accept busbar or cable lugs; plan for a bolted connection rather than spring-cage wiring. Thermal class H per IEC 60085 means the insulation system withstands 180 °C hot-spot temperature, so it can sit in a warm cabinet alongside drives without derating — provided ambient stays at or below the 40 °C rating. The IP00 protection class means no dust or splash protection; mount it inside a panel with at least IP54 clearance from live parts.