What this choke does in a DC bus
The SIDAC 4EM5214-7CB00 is a single-phase smoothing choke rated for 49 A DC maximum with a continuous rated current of 44.1 A at 600 V DC. Its 0.0012 H inductance smooths ripple from a DC supply. The 29 W coil loss and 1.44 W energy content tell you the thermal budget: at full rated current the choke dissipates 29 W, so it needs free air or forced ventilation — IP00 means no enclosure, so it's intended for inside a panel where airflow is managed.
Sizing and thermal class
Thermal class B per IEC 60085 means the insulation system handles a 130 °C hot-spot temperature. The 55 °C ambient rating is the maximum surrounding air temperature at which the choke delivers its full 44.1 A without derating. Above that, you'd need to reduce current or increase airflow. Dimensions are 0.149 m deep by 0.121 m wide by 0.109 m tall — a compact block that fits a standard sub-panel footprint. Terminals are free cable endings, so you'll need a terminal block or ring lug interface in the cabinet.