Mains choke for VFD line input — 1120 A, 400/480 V AC
The Siemens 4EU3652-7UC00-1BA0 is a three-phase mains choke (Netzdrossel f. FU) sized for variable-frequency drive input lines. It carries a maximum AC current of 1120 A at 400/480 V AC, 50/60 Hz, with a rated operational current of 1008 A. The rated inductance is 0.0126 mH (12.6 µH) and the relative inductive voltage drop is 2% at rated current, voltage, and frequency — this limits harmonic distortion and inrush current on the drive's DC link without excessive voltage drop under load. The choke is IP00 — open-frame construction — so it must be installed inside a cabinet with appropriate clearance and ventilation. Thermal class H (IEC 60085) insulation allows continuous operation at 40 °C ambient, with a total power loss of 529 W (394 W coil, 135 W iron core). Connections are via flat-type terminals, sized for the 1120 A circuit. Compliance documentation covers EN 61558-2-20 and UL/CSA recognition, so the part meets the common North American and European safety standards for drive input chokes.
Integration note
At 350 mm wide, 321 mm high, and 237 mm deep, the choke occupies a significant footprint inside the cabinet. IP00 construction means it must be mounted on a non-flammable base with at least 50 mm clearance to adjacent components for airflow. Flat-type terminals require busbar or large-crimp lugs — plan the connection layout before final assembly.