U351 Marathon Electric Motors
KKM Solutions is an independent parts distributor, not an authorized Marathon dealer — how we source.
Overview
Part number U351 from Marathon, listed in Electric Motors. Specifications on file: Catalog Number U351; Duty Continuous; Enclosure Type TEFC; Frame 256JM. KKM Solutions quotes this part with pricing and availability confirmed per order.
Feature NEMA JM pump shaft dimensions Ball bearings, mechanically locked on shaft end Continuous duty 1.15 Service Factor UL Recognized and CSA Certified Close-Coupled Pump Motor, 20 & 15 HP, 3 Ph, 60 & 50 Hz, 230/460 & 190/380 V, 3600 & 3000 RPM, 256JM Frame, TEFC - Marathon catalog number U351 (ordering code 256TTFL4006). Marathon specifications: Phase: 3; Output HP: 20 & 15 Hp; Output KW: 14.9 & 11.2 kW; Voltage: 230/460 & 190/380 V; Speed: 3510 & 2915 rpm; Service Factor: 1.15 & 1.15; Frame: 256JM; Thermal Protection: No Protection; Efficiency: 90.2 & 90.2 %; Ambient Temperature: 40 °C; Frequency: 60 & 50 Hz; Current: 47/23.5 & 43/21.5 A; Power Factor: 87.5; Duty: Continuous; Insulation Class: F; Design Code: B; KVA Code: G; Drive End Bearing Size: 6309; Opp Drive End Bearing Size: 6207; Enclosure: Totally Enclosed Fan Cooled; UL: Recognized; CSA: Y.
Specifications
| Catalog Number | U351 |
|---|---|
| Duty | Continuous |
| Enclosure Type | TEFC |
| Frame | 256JM |
| Frame Material | Rolled Steel |
| Frequency | 60 Hz |
| Full Load Amps | 47.0/23.5 |
| Horsepower | 20 HP |
| Model | 256TTFL4006 |
| Mounting | Rigid |
| Phase | 3 |
| Product Line | Close-Coupled Pump |
| Speed | 3600 RPM |
| Weight | 232 lb |
Product details
| Manufacturer | Marathon |
|---|---|
| Manufacturer part number | U351 |
| Product category | Electric Motors |
| Published specifications | 14 attributes listed |
| Related part numbers | 1 other part number in this family |
Request a quote for this part
Email orderdesk@kkmsolutions.com or call (825) 454-5367 for pricing and availability.
Frequently Asked Questions
How much does U351 cost?
U351 is listed at CA$2,034.98 (CAD) and can be ordered directly from this page with Add to Cart. That figure is a reference price and can change: your card is authorized at checkout and charged only once our order desk confirms the part, stock, and final price, and we email you first if anything has moved. Larger quantities or custom terms — email orderdesk@kkmsolutions.com for a volume quote.
Who manufactures the U351?
U351 is made by Marathon and is listed in our Electric Motors category. KKM Solutions is an independent distributor, not an authorized Marathon dealer: we source the exact Marathon part number U351, and the quote confirms condition and lead time before you order.
Is the U351 new and genuine?
Parts we supply are new and genuine unless the quote expressly states otherwise. Where a part is new-old-stock, from excess inventory, refurbished or open-box, the quote says so before you approve it.
What warranty comes with the U351, and can I return it?
Parts we supply are warranted against manufacturing defects for 1 year from the date of delivery; where the manufacturer's own warranty is longer, the manufacturer's warranty applies. The warranty covers repair, replacement, or credit of the defective part and does not cover normal wear items, misapplication, improper installation, or consequential damages. Contact us within 30 days of delivery before returning anything — all returns need a return authorization from the order desk.
What is the lifecycle status of U351?
No published lifecycle status is on file for U351. Marathon lists whether a catalog number is current, superseded or end-of-life on its own product page, and our order desk confirms the status with the manufacturer at quote time, before you commit. Send the part number through the quote form on this page.
What are the key specifications of U351?
Key specifications include Catalog Number: U351; Duty: Continuous; Enclosure Type: TEFC; Frame: 256JM. The full specification table on this page lists every published attribute for this part.
What is the power rating of U351?
Per the published specification for U351: Horsepower: 20 HP. Confirm against the full specification table on this page, or ask our order desk to verify it with the manufacturer at quote time.
How much does U351 weigh?
Per the published specification for U351: Weight: 232 lb. Confirm against the full specification table on this page, or ask our order desk to verify it with the manufacturer at quote time.
How quickly can U351 ship?
Lead time for U351 is quoted per order and confirmed on your quote, which our order desk sends within 1 business day. For a line-down emergency, call the 24/7 order desk at (825) 454-5367.
Variants & Related Part Numbers
Other Marathon part numbers in this family:
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