Verified specifications
| Horsepower | 1 HP (full-rated) |
|---|---|
| Total HP (THP) | 1.5 THP (1 HP × 1.50 SF) |
| Service factor | 1.50 |
| Speed | 3450 RPM |
| Voltage | 115/230V, single-phase, 60 Hz |
| Full-load amps | 18.6/9.3A |
| Frame | 56J (threaded C-face) |
| Enclosure | Open drip-proof (ODP) |
| Motor type | Capacitor start |
| Rotation | CCWPE (counterclockwise, pump end) |
| Shaft | 5/8" 303 stainless steel, 7/16-20 UNF-2A thread, 2-9/16" extension |
| Bearings | Sealed ball bearings |
| Thermal protection | Automatic |
| Insulation | Class B |
| Ambient | 50°C |
| Length | 12.13" overall |
| Listings | UL 1081 |
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 ST1102 page.
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 ST1102Same stock number under A.O. Smith branding — identical motor
Documented equivalent replacements
The motors below are published as replacements for this model in the cross-reference tables cited. We confirm the match against your nameplate before quoting:
| Documented equivalent | Cross-reference source |
|---|---|
| US Motors AST165 | Nidec US Motors Replacement Cross Reference (manufacturer) |
| Century B128 / B229SE | Nidec US Motors Replacement Cross Reference (manufacturer) |
| A.O. Smith HST150 | Nidec US Motors Replacement Cross Reference (manufacturer) |
Cross references via Nidec US Motors' published Replacement Motor Cross Reference (pool/spa), manufacturer-published. Crossed motors are documented replacements — match THP, frame, and flange to your nameplate before ordering.
Need a Century ST1102?
Send the nameplate off your failed unit. We'll confirm the match and quote the ST1102 or a verified equivalent with availability and lead time.
Quote this motor