Commutating choke for converter line filtering
The Siemens 4EM5006-1CB00 is a single-phase commutating choke (line reactor) designed for converter input or DC-link circuits. It limits current rise rates and reduces harmonic distortion on the AC line feeding a variable-frequency drive or rectifier. Rated for 230 V AC at 50 Hz, it carries a maximum continuous current of 35.5 A and a rated current of 31.95 A, with an inductance of 0.79 mH and a relative inductive voltage drop of 4% at rated conditions.
Electrical and thermal ratings
The choke is rated for 230 V AC, 50 Hz, single-phase. Maximum current is 35.5 A; the continuous rated current is 31.95 A. At DC, the rated current is 43.5 A — useful when the choke is placed in the DC link rather than the AC input. Power loss splits between the coil (18 W) and the iron core (19.7 W), totaling 37.7 W of heat to dissipate inside the enclosure. Thermal class B per IEC 60085 means the insulation system withstands 130 °C hot-spot temperature, which is standard for industrial converter applications.
The choke measures 0.115 m deep, 0.097 m wide, and 0.111 m high — a compact footprint that fits into a standard control panel on a mounting plate. Protection class IP00 means it is an open-frame component: no enclosure, so it must be installed inside a cabinet that provides the required touch protection and environmental sealing. The main circuit connects via screw-type terminals, which simplifies field wiring with ring or fork lugs. Ambient temperature rating is 40 °C; above that, derate the continuous current per the manufacturer's thermal curve.