The Siemens 4EP3500-0GK00 is a three-phase mains choke — a line reactor — designed for the input side of a variable-frequency drive (VFD). It smooths line current, reduces harmonic distortion, and limits inrush current spikes that would otherwise stress the drive's DC bus capacitors. The rated inductance of 4.2 mH (0.0042 H) at 400 V AC, 50 Hz, with a 4 % relative inductive voltage drop, means it presents a predictable impedance to the line, damping harmonics across the switching frequency range. The rated current of 6.3 A (maximum 7 A) sets the continuous load it can carry at 40 °C ambient; thermal class B (130 °C insulation rating) per IEC 60085 limits the winding temperature rise. IP00 means it is an open, chassis-mount component — no enclosure, so it must be installed inside a panel with adequate clearance and ventilation.
The choke measures 148 mm wide, 139 mm high, and 68 mm deep — a compact footprint for a 6.3 A three-phase reactor. It uses screw-type terminals and tab terminals for the main current connections, which accept standard ring or fork lugs. The thermal class B (130 °C) winding insulation means the surface temperature can reach 100 °C under full load; allow for natural convection airflow around the choke and avoid mounting directly above heat-sensitive components.