SINAMICS output choke for power module FSA1 3AC 380V-480V 6.1A Electrical choke SINAMICS output choke for the modular frequency converter SINAMICS G120 and the compact converter SINAMICS G120C. Output chokes reduce the voltage gradient (du/dt) and the height of the current peaks. They also enable the connection of longer motor cable lengths. The output choke should be mounted as close to the power module as possible. SINAMICS - simply my drive.