TDK Corporation has announced that in addition to its own range of two-line filters for its power supplies, TDK-Lambda is offering complementary SIFI series two-line EMC filters and IEC inlet filters manufactured by Epcos, a TDK group company. Even if a power supply is compliant with EMC norms, EMC filters are needed when the load produces additional disturbances, for example from electric motors and variable speed drives. Often those disturbances are in a high and/or different frequency range from that of the filter inside the power supply itself. Some applications also involve more than one power supply and their conducted electrical noise can cause failure in EMC tests. Furthermore, long cabling looms in the application can cause an “antenna effect”, creating radiated noise disturbances both externally and within the application itself. Professional high-end EPCOS EMC filters include the SIFI product line, a standardised modular system based on five product lines with different insertion loss characteristics and terminal styles, including a medical version with low leakage current. Also offered is the proven B84771 series of EPCOS IEC inlet filters with two new series. The B84773 series features an integrated fuse, while the B84776 series has both a switch and a fuse.
Contact Tobie Muller, Accutronics, Tel 011 782-8728, tmuller@accutronics.co.za
