SINAMICS Line filter class B for Power Module FSB base mounting possible 380V-480V 3AC 23.5A Electrical filter SINAMICS line filter, class B for the modular SINAMICS G120 frequency converter, the PM240/240-2 Power Module of the SINAMICS G120 modular frequency converter and the SINAMICS G120C compact converter. With an additional line filter, the Power Module achieves a higher radio interference class. SINAMICS – simply my drive!