High-performance three-line EMC filters for frequency converter applications

TDK-Epcos has announced availability of the compact B84243A8 series of three-line EMC filters for frequency converters. The high-performance filters are suitable for a rated voltage of 530VAC in 50/60Hz grids. The series currently comprises seven different types that are designed for currents of between 3A and 60A – based on a rated temperature of 50C. Furthermore, the filters are characterized by their extremely compact dimensions: Depending on the exact model, these typically lie between 190mm x 40mm x 95mm and 250mm x 85mm x 120mm. Recessed connections permit optimum access to the mounting bracket, making the filters suitable for installation in switching cabinets or where limited space is available. The EMC filters also feature short discharge times. For example, at currents up to 44A the filters achieve a residual voltage of <60V in less than one minute. The 3A version with a leakage current of less than 2mA has been specially developed for plug-in devices that must meet low leakage current limits. The other models in the new series have leakage currents of no more than 5.1mA and can also be operated in environments with sensitive residual current devices (RCDs). In addition, the new EPCOS filters are designed for a high short-circuit current (SCCR) of 100 kA in accordance with UL 508. Approvals according to UL, CSA and ENEC are pending, says the company.