Verified specifications
| Horsepower | 1/2 HP |
|---|---|
| Speed | 1725 RPM (4-pole) |
| Voltage | 115V |
| Phase | Single-phase, split phase |
| Frequency | 60 Hz |
| Frame | 48YZ |
| Enclosure | Open Dripproof (ODP) |
| Full-load amps | 7.5 A |
| Mounting | Resilient base |
| Bearings | Ball bearings |
| Rotation | CCW viewed opposite shaft end (selective) |
| Thermal protection | None — external overload protection must be provided |
| Marathon model number | 48S17D2058 |
| Weight | 18 lb (catalog) |
| Certifications | UL Recognized, CSA Certified |
The catalog frame suffix is 48YZ; many distributors list it as 48Y or 48Z — same motor. Per the Marathon catalog the B306 has no built-in thermal overload (the sibling B307 is the auto-overload variant of the same 1/2 HP rating).
No replacement available? We can rebuild it
If your B306 is obsolete, has a long lead time, or is a custom build, our shop — Current Electric Motor Supply — repairs and rewinds motors up to 800 HP. Send the nameplate and we'll tell you honestly whether a rewind makes sense or a new replacement is the better move.
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 Marathon models
- More Marathon modelsBrowse every Marathon model page we quote
- Marathon B3021/4 HP, 1725 RPM, 115V 1-phase ODP belt-drive fan/blower, 48YZ resilient base
- Marathon B3041/3 HP, 1725 RPM, 115V 1-phase ODP belt-drive fan/blower, 48YZ resilient base
Need a Marathon B306?
Send the nameplate off your failed unit. We'll confirm the match and quote the B306 or a verified equivalent with availability and lead time.
Quote this motor