The Allen-Bradley 150-SB3NBR SMC-50 Smart Motor Controller is expertly engineered for efficient 3-phase induction motor management with a robust 140A current capacity and a voltage rating of 460V AC. This compact, space-saving controller operates within a frequency range of 47-63Hz and features comprehensive voltage control through six SCRs, efficiently managing voltage and torque during motor start-up, running, and shutdown. Designed with advanced protection mechanisms such as the RC Snubber Network and Metal Oxide Varistors, plus a comprehensive set of features like Electronic Motor Overload Protection, nine diverse start modes, and precise metering capabilities, this controller is especially suitable for demanding industrial applications.