Siemens AG 6SE3190-0BA87-2RA0 Braking Resistor

Siemens 6SE3190-0BA87-2RA0 is an external brake resistor designed for Siemens MICROMASTER inverters, specifically the MM25 through MM75 family and the MM25/2 through MM75/2 variants, marketed as a MICROMASTER flat resistor accessory. This flat resistor provides a dedicated energy-dissipation path during dynamic braking, allowing the inverter to absorb the motor’s kinetic energy during deceleration and prevent overvoltage on the DC bus. As an approved Siemens component, it is intended to be paired with the corresponding MICROMASTER MM-series controllers to deliver reliable braking performance in industrial automation environments. The "flat resistor" form factor is suited for compact installations where space is at a premium inside control panels, and the accessory is designed to mount in accordance with Siemens installation guidelines for external braking components. In typical use, the brake resistor handles the energy that would otherwise be dissipated by the motor during braking, enabling smoother deceleration profiles and protecting drive electronics from excessive regen. Applications commonly involve conveyors, pumps, fans, and other equipment controlled by MICROMASTER MM-series drives, where controlled braking energy management improves process stability and equipment longevity.