Description
A.O. Smith Century Motor 2.0 HPSPL [1-S] [SqFl] [115/230V] (B2859) is a robust, uprated replacement motor designed to keep residential, commercial, and industrial systems running smoothly. Built on the trusted A.O. Smith/Century/Regal Beloit platform, this unit blends dependable performance with flexible installation options for a wide range of equipment.
- Replaces: 222420, 3510831, B859, MGT-60-2859
- Voltage: 115V / 230V, Phase: 1 (single-phase)
- Frame: 56Y, Speed: 1-Spd
- Horsepower: 2.0 HP (nominal); Total HP: 2.2 THP
- Shaft: Threaded; Capacitor on Top: Yes
- Motor Style: Square Flange
- Manufacturer: A.O. Smith / Century / Regal Beloit
Why this uprated model stands out: while it carries the familiar 2.0 HP designation, it’s engineered as a TRUE 1.5 HP performance motor in typical service, offering enhanced efficiency and reliability in demanding applications. The on-top capacitor configuration supports straightforward wiring and service, while the square flange mounting and threaded shaft simplify installation into existing OEM layouts.
This motor is purpose-built for single-phase HVAC and pump systems, with broad cross-compatibility across equipment that uses square-flange 56Y frames. It’s a natural choice for air conditioning compressors (hermetic motors), pool and spa pumps, water pumps, and other similar loads where dependable start-up and consistent speed matter.
Key advantages you’ll notice in the field:
- Easy replacements thanks to exact cross-reference compatibility and a common 56Y frame footprint.
- Versatile voltage support reduces inventory complexity by covering both 115V and 230V installations.
- Reliable single-phase operation ideal for residential and light commercial equipment without the need for three-phase power.
- Capacitor-on-top design simplifies serviceability and reduces installation time.
Designed with the long-term service life in mind, this motor draws on Regal Beloit’s global leadership in electric motors and A.O. Smith’s legacy of durability. Whether you’re replacing a failed unit in an aging system or upgrading to a more efficient, dependable motor, the B2859 delivers consistent performance and a familiar, OEM-compatible form factor.
Ideal for: HVAC condensers and air handlers, heat pumps, pool and spa pumps, and other 1-phase applications requiring a square-flange, 56Y-frame, dual-voltage motor with a top-capacitor design. Use cases range from residential cooling setups to light commercial equipment, where quick swap-in and reliable operation matter most.
Practical notes for installation and maintenance: confirm the replacement’s cross-reference matches your original part, verify voltage and wiring according to your system’s control circuit, and keep the top-mounted capacitor accessible for future service. With its heritage of reliability and robust build, the A.O. Smith Century Motor 2.0 HPSPL B2859 is a trusted choice for sustained performance in demanding environments.
| Motor Amperage | 21.0A/10.5A |
| Voltage | 115v/230v |
| Phase | 1 Phase (1ph) |
| Frame Type | 56Y |
| Speed | 1 Speed (1-Spd) |
| Horsepower | 2.0hp |
| Total Horsepower | 2.2thp |
| Motor Shaft Type | Threaded |
| Motor Style | Square Flange |
| Capacitor On Top | Yes |
| Manufacturer | AO Smith/Century/Regal Beloit |
| WHY USE A.O. SMITH (AOS)/CENTURY PRODUCTS? |
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Regal Beloit America, Inc. (Century Electric Motors / A.O. Smith Electric Motors) is a leading supplier of electric motors for residential, commercial, and industrial applications. With operations in the United States, Mexico, China, and Europe, Regal Beloit America, Inc. has the ability to serve its customers electric motor needs on a global basis. We offer a comprehensive line of hermetic motors (used in air conditioning compressors), fractional horsepower A/C and D/C motors, and integral horsepower motors. We sell our products directly to original equipment manufacturers (OEMs), and replacement motors to HVAC and pool/pump distributors. |
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