The open-type Allen-Bradley 150-SB1NBD is a versatile solid-state SMC-50 smart motor controller designed to accommodate three-phase line voltages ranging from 200 to 460V AC at both 50 and 60 Hz, with controller ratings at 90 A. It adeptly manages motor currents from 30 to 90 A, supporting motors with horsepower ratings of 10 to 60 HP depending on voltage and frequency specifications. Equipped with a control voltage ranging from 100 to 240V AC, it provides standard 24V DC inputs and relay outputs. Measuring 36 x 51 x 14 inches and weighing 35.1 lbs, this controller supports various starting modes, including soft start and torque control, while ensuring safety through features like continuous SCR control, comprehensive phase voltage and current monitoring, and built-in motor overload protection.