The SIDAC 4EM5104-2CB00 is a single-phase DC smoothing choke — a Glaettungsdrossel per the designation — rated for 10 A maximum, 9 A continuous DC, at 690 V operating voltage with 0.02 H inductance. Screw-type and tab terminals on the main circuit make for straightforward field wiring.
The 9 A rated DC current (10 A max) sets the continuous load this choke can handle in a DC bus or smoothing circuit — exceeding that risks saturating the 0.02 H core and losing inductance, which defeats the filtering purpose. Thermal class B (130 °C rise) per IEC 60085 means the winding insulation is rated for a 40 °C ambient, so in a 40 °C cabinet the choke can run at full rated current without derating; hotter environments require a load reduction. The 27 W coil power loss and 0.6 W iron core loss are the heat the choke dumps into the panel — factor those into your thermal budget.
At 0.129 m depth, 0.097 m width, and 0.111 m height, this choke occupies a modest footprint on a panel backplate or chassis. Screw/tab terminals accept ring lugs or fork terminals for the DC bus wiring. No DIN-rail clip is specified; expect bolt-down or through-hole mounting directly to the panel.