AO Smith Century Motor 3/4 HP 115V Single Phase Replacement Electric Motor 1S 48Y BN 24SS

A.O. Smith Century Motor 3/4 HP, 1-S, 48Y frame, 115V (BN-24SS) is a proven, reliable replacement motor crafted for residential, commercial, and industrial applications. Built on the legacy of A.O. Smith/Century, and supported by Regal Beloit America, this motor represents decades of engineering focused on durability, compatibility, and easy installation.

Designed to meet the needs of contractors, OEMs, and distributors, this 3/4 HP motor delivers dependable performance in a compact 48Y frame. It’s a practical, drop-in replacement for a wide range of equipment—from pool and spa pumps to HVAC components—ensuring minimal downtime and fast service calls.

Why this motor stands out

• Longstanding heritage: Century/A.O. Smith motors have powered residential, commercial, and industrial systems for over 75 years, now backed by a global support network through Regal Beloit.
• Extensive replacement compatibility: Part of a complete line used by OEMs and replacement motor distributors for HVAC, pool, and spa equipment, making it a trusted choice for service across multiple industries.
• 1-S speed, 48Y frame, 115V: A compact, single-speed design that fits standard installations and matches common control wiring and mounting patterns found in pool/pump and HVAC setups.
• Electronic control and efficiency mindset: Built to align with the industry shift toward electronically controlled motors and improved system efficiency, helping you upgrade performance without overhauling your equipment.
• Centurion heritage, switchless, PSC lineage: Historically known for switchless operation and permanent split capacitor design, offering smooth performance and reliable starting characteristics in demanding environments such as spas and compressors.

Ideal use cases

• Pool and spa pumps, hot tubs, and jetted tubs requiring a dependable 3/4 HP replacement motor
• HVAC components and air conditioning condenser circuits that need a robust, ready-to-replace motor
• Industrial or commercial equipment within the same frame and voltage family seeking a durable, serviceable motor
• OEM replacement projects where compatibility with existing mounting, wiring, and control configurations is critical

What problems this motor solves

• Minimizes equipment downtime with a straightforward, compatible replacement that aligns with standard 48Y frames and 115V electrical setups
• Reduces maintenance hassles by leveraging a legacy design known for reliability and broad aftermarket support
• Provides a seamless upgrade path for systems seeking improved efficiency and modern control options without a full redesign

Practical guidance for installation and use

• Verify compatibility with your current mounting footprint, shaft alignment, and electrical harnessing before replacement
• Leverage existing control wiring and connectors common to 115V, single-speed installations to simplify retrofits
• Consider the PSC design lineage if your system relies on capacitor-start, run-capacitor configurations for optimal torque and smooth operation
• Consult OEM documentation or distributor technical support for any model-specific wiring or shaft-sleeve requirements

With its deep roots in American motor manufacturing and a global network behind it, the A.O. Smith Century 3/4 HP BN-24SS is more than a replacement part—it’s a durable, future-ready choice for reliable system performance across pools, spas, and HVAC equipment. If you’re selecting a motor that combines heritage, compatibility, and practical efficiency, this is a dependable option you can trust for years of service.