The Allen-Bradley 150-F251NZD SMC-Flex is a robust solid-state controller designed for high-performance applications, offering an open enclosure design. It boasts a remarkable controller rating of 251 amps and supports up to 200 horsepower at 460 volts AC, with a maximum rated voltage of 690 volts AC. Additionally, it accommodates a wide input voltage range of 230 to 690 volts AC in a 3-phase configuration, operating on both 50 and 60 Hz frequencies, while featuring a control voltage between 100 and 240 volts AC for optimal flexibility.