MICROMASTER 4 braking resistor 200-240V 180R 1000W PK 50W Kont. 230x 72x 43.5mm HxWxD IP20 braking resistor SINAMICS braking resistor for SINAMICS V20, as well as the MICROMASTER 4. The braking resistors are designed for use with the MICROMASTER 440 inverter series, housing sizes A to F with integrated braking chopper and enable rapid braking of loads with a large moment of inertia. During braking of the motor and load, excess energy is fed back to the inverter. This causes a voltage increase in the DC link. The inverter diverts the excess energy to the externally mounted braking resistor. The braking resistor can be used for the voltage range 200 V to 480 V. SINAMICS - simply my drive.