Verified specifications
| Horsepower | 2 HP high / 0.25 HP low |
|---|---|
| Speed | 3450/1725 RPM (two-speed) |
| Voltage | 230V, single-phase, 60 Hz |
| Full-load amps | 10.5/2.6A |
| Service factor | 1.0 |
| Frame | 48Y (thru-bolt) |
| Enclosure | Open drip-proof (ODP) |
| Motor type | Capacitor start |
| Rotation | CCWSE (verify on nameplate — unusual for pool motors) |
| Shaft | 1/2" threaded (3/8-16 UNC-2A) |
| Bearings | Ball bearings |
| Thermal protection | Automatic |
| Insulation | Class B |
| Mounting | Rigid base |
48Y fitment: thru-bolt mount — above-ground pools, spas, and jetted tubs. Two-speed models (like the BN51) run the pump at high speed for filtering cycles and low speed for continuous circulation.
Shaft seal: replace the pump shaft seal whenever the motor is changed — a leaking seal is the #1 killer of new pool pump motors.
Dual branding: this stock number is sold interchangeably as A.O. Smith and Century — Regal Rexnord's aftermarket motor brand. Same motor, same specs; see the Century BN51 page.
The 2 HP sibling of the Century BN62 (3/0.38 HP) — above-ground pool, spa, and jetted-tub duty.
Confirming the right replacement
Before we quote, compare these fields on your failed motor's nameplate. If any of them differ, send us a photo of the nameplate and we'll match it exactly rather than guessing:
- Full model number — including any suffix letters
- HP, RPM, and voltage
- Frame size (e.g. 284T) and enclosure (TEFC, ODP, etc.)
- Full-load amps
Other A.O. Smith models
- More A.O. Smith modelsBrowse every A.O. Smith model page we quote
- Century BN51Same stock number under Century branding — identical motor
Need a A.O. Smith BN51?
Send the nameplate off your failed unit. We'll confirm the match and quote the BN51 or a verified equivalent with availability and lead time.
Quote this motor