Product Description:

The 21.E4.T60-3001 electromagnetic interference filter is produced by KEB and belongs to the Combiline EMC Filters series. In an automation cabinet, it is wired between the mains supply and a frequency inverter or servo drive so that conducted noise is suppressed before it reaches plant wiring or external equipment. By limiting differential-mode and common-mode disturbances, the module supports compliance with worldwide factory emission limits and helps prevent malfunctions in nearby sensors, PLC I/O, and network cables that share the same power distribution.

This filter is engineered for a rated line current of 110 A on three-wire connections and withstands a phase-to-phase voltage of 460 V AC. Its attenuation performance meets the stringent EN 55011 Class B emission category, making it suitable for machines that must satisfy residential or medical standards rather than the less restrictive industrial class. During operation, the internal circuitry leaks only 35 mA of current to protective earth, a figure that helps determine the selection of ground-fault monitoring devices. Thermal dissipation is limited to 90 W at full load, so forced ventilation is rarely required, yet the 240 mm installation depth should still be checked against cabinet clearances before mounting. The three-wire terminals accept ring lugs or busbars and are arranged to keep the line-side conductors physically separated from the load side.

Copper feeders up to 25 mm² can be clamped without additional adapters, allowing the same cable size that is normally chosen for the drive’s power input. The steel housing stands 458 mm high and spans 120 mm in width, giving the coil windings enough surface area for convection cooling and short magnetic paths. With a transport mass of 11 kg, the assembly provides stable mounting and helps resist movement from vibration generated by nearby motors.