Marathon Electric Y551 Black Max AC Motor, 2HP Frame 145TC

The Marathon Electric Y551 is a Black Max® premium inverter-duty AC motor, designed specifically for use with variable frequency drives (VFDs) in high-performance applications. With a 2 HP rating and a 145TC frame, it delivers precise speed and torque control across a wide speed range, making it ideal for demanding industrial automation, conveyors, fans, and machine tools. Technical Specifications: Manufacturer: Marathon Electric (Regal Rexnord) Model Number: Y551 Series: Black Max® – Inverter Duty Motor Horsepower: 2 HP Frame Size: 145TC (NEMA – C-face with rigid base) Speed: 5400 RPM max (4-pole motor) Voltage: 230/460V, 3-phase, 60 Hz Full Load Amps: ~3 A @ 460V ~6 A @ 230V Enclosure: TEFC (Totally Enclosed Fan Cooled) Insulation Class: Class F with Class B temperature rise Service Factor: 1.0 Efficiency: NEMA Premium Efficiency Constant Torque Speed Range: 0–1000:1 (suitable for full torque at low speeds) Encoder Ready: Yes – provisions for encoder mounting (some models include encoder) Bearings: Sealed ball bearings Mounting: Foot-mounted base with C-face flange Construction: Cast iron or rolled steel housing Inverter Duty: Yes – designed for continuous use with VFDs Ambient Temperature: Up to 40°C