Verified specifications
| Horsepower | 2.5 HP (up-rated) |
|---|---|
| Total HP (THP) | 2.65 THP (2.5 HP × 1.06 SF) |
| Service factor | 1.06 |
| Speed | 3450 RPM |
| Voltage | 208-230V, single-phase, 60 Hz |
| Full-load amps | 12.6/11.4A |
| Frame | 56J (threaded C-face) |
| Enclosure | Open drip-proof (ODP) |
| Motor type | Capacitor start |
| Shaft | 5/8" 303 stainless steel, threaded |
| Length | 13.06" overall |
Pool-duty motors: match the total HP (HP × service factor) to your pump's requirements, and confirm full-rated vs up-rated before swapping.
Dual branding: this stock number is sold interchangeably as Century and A.O. Smith — the same Regal Rexnord motor. See the A.O. Smith UST1252 page.
Service factor: published as 1.06 in some tables and 1.10 in others (2.65 vs 2.75 THP) — match the THP on your nameplate.
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 Century models
- More Century modelsBrowse every Century model page we quote
- A.O. Smith UST1252Same stock number under A.O. Smith branding — identical motor
Need a Century UST1252?
Send the nameplate off your failed unit. We'll confirm the match and quote the UST1252 or a verified equivalent with availability and lead time.
Quote this motor