The Allen-Bradley 150-S251NBD, part of the SMC-50 series, is a high-performance motor controller designed to deliver up to 251 Amps of output current with a rated line voltage of 200 to 480 Volts AC in three-phase. Featuring an internal bypass and an energy-saving mode, this controller enhances efficiency and minimizes system downtime. It supports modes like soft stop and start, pump control, and can be configured via PC or its LCD, while offering maximum output power of 200 horsepower at 460 Volts AC and 60 Hertz.