Schurter has announced its new FMAB NEO single-phase EMC filter for Protection Class II applications. This new double-insulated filter with no protective ground expands the company’s EMC filter family to include both Protection Class I and Class II versions. 

The Class II version meets the more stringent requirements for critical medical systems and at-home medical care devices according to IEC 60601-1-11 & 12. These requirements include increased insulation safety testing, lower leakage current, and higher attenuation performance of electro-magnetic interferences, particularly symmetrical attenuation.

According to IEC 61140, the term Protection Class II is also referred to as protective insulation. It is further defined as protection by doubling or reinforcing insulation of live parts. All clearances and creepage distances must be doubled, requiring that the inside of the filter also has double or reinforced insulation. The new FMAB NEO for Class II meets these requirements, with reinforced insulation inside of the filter and large plastic collars around the terminals.