P56H3119R-AC Reliance Electric General-Purpose Three-Phase Induction Motor

The P56H3119R-AC is a compact, rugged general-purpose three-phase induction motor from Reliance Electric’s Duty Master series, built to NEMA 56C frame standards. It delivers reliable, cost-effective performance for light-duty industrial and commercial applications, supporting continuous operation in clean, non-harsh environments.

This motor has a rated power of 1/3 horsepower and a nominal full-load speed of 1725 revolutions per minute at 60 hertz, utilizing a 4-pole winding design for steady torque output. The standard voltage rating is 208-230/460 volts AC, three-phase, ensuring compatibility with common industrial and commercial power distribution systems. It employs a Class B insulation system, rated for a maximum operating temperature of 130 degrees Celsius, providing consistent thermal protection during normal continuous-duty operation. The motor features a 1.0 service factor, optimized for full-load operation without dedicated overload capacity.

Constructed with a durable NEMA 56C cast-iron frame, the P56H3119R-AC offers structural rigidity in a compact footprint, ideal for installation in space-constrained equipment and enclosures. It comes with a Totally Enclosed Fan-Cooled (TEFC) enclosure, which shields internal windings, rotor, and bearings from dust, dirt, and moisture, making it suitable for indoor workshops, commercial facilities, and light industrial settings. An external cooling fan maintains efficient heat dissipation during extended runtime, preventing overheating and ensuring long-term reliability.

Equipped with high-quality sealed ball bearings at both ends of the rotor shaft, the motor minimizes friction and reduces routine maintenance, supporting a long service life with infrequent lubrication. The output shaft is precision-machined with a standard keyway for secure connection to pulleys, small gears, and light-duty couplings. Designed for foot-mounted installation with standard NEMA 56C mounting dimensions, it enables straightforward alignment and fastening to equipment bases or mounting brackets.

The internal squirrel-cage rotor undergoes dynamic balancing for smooth, low-vibration operation and quiet performance. Built with high-grade copper windings and adhering to strict factory quality control standards, the motor maintains stable efficiency and low failure rates under typical light-load conditions. It is compatible with across-the-line starters, contactors, and basic variable frequency drives, allowing easy integration into light industrial automation systems.

The P56H3119R-AC is widely used in light industrial and commercial equipment, including small fans, blowers, and centrifugal pumps, light-duty conveyor systems, packaging machinery, woodworking tools, and general-purpose workshop machinery. Its compact size, dependable performance, and versatile design make it suitable for both original equipment manufacturing and direct replacement of older 1/3-horsepower motors in existing systems.