MICROMASTER 4 braking resistor 380-480V 390R 2000W PK 100W Kont. 230x 72x 43.5mm HxWxD IP20 braking resistor SINAMICS braking resistor substructure component for the G120C compact inverter. The braking resistor enables the inverter to actively brake a load with a high moment of inertia. The braking resistor as a substructure component is available in the FSAA frame size in a power range between 0.55 kW and 1.5 kW. SINAMICS - simply my drive.