The OAB400-22-1 is a centrifugal fan featuring a robust diecast aluminum frame and an external rotor motor design. It operates on a 230 VAC (50 Hz) supply, drawing a nominal current of 1.26 A to deliver an airflow of 1900 CFM at a rated speed of 1250 RPM. Key features include an IP55 rating for protection against dust and water, integrated thermal protection, and a sealed dual ball bearing system for longevity. With a wide operating temperature range from -40°C to +50°C and a life expectancy of 40,000 hours, this fan is designed for reliable performance in demanding industrial and commercial cooling applications.