W551A Marathon 20HP Three Phase XRI IEEE-841 Blue Chip Severe / Automotive Duty Premium Motor
KKM Solutions is an independent parts distributor, not an authorized Marathon dealer — how we source.
W551A MARATHON 20HP Three Phase XRI IEEE-841 Blue Chip Severe / Automotive Duty Premium Motor is designed for extreme applications.
Overview
Part number W551A from Marathon, listed in Electric Motors. Specifications on file: Duty Continuous; Enclosure Type TEFC; Frame 256T; Frame Material Cast Iron. KKM Solutions quotes this part with pricing and availability confirmed per order.
W551A MARATHON 20HP Three Phase XRI IEEE-841 Blue Chip Severe / Automotive Duty Premium Motor is designed for extreme applications. Severe Duty Motor, 20 HP, 3 Ph, 60 Hz, 460 V, 3600 RPM, 256T Frame, TEFC - Marathon catalog number W551A (ordering code 256THFCD9001). Marathon specifications: Phase: 3; Output HP: 20 Hp; Output KW: 14.9 kW; Voltage: 460 V; Speed: 3540 rpm; Service Factor: 1.15; Frame: 256T; Thermal Protection: No Protection; Efficiency: 91 %; Ambient Temperature: 40 °C; Frequency: 60 Hz; Current: 23.5 A; Power Factor: 88; Duty: Continuous; Insulation Class: H; Design Code: B; KVA Code: G; Drive End Bearing Size: 6309; Opp Drive End Bearing Size: 6209; Enclosure: Totally Enclosed Fan Cooled; UL: Listed; CSA: Y.
Specifications
| Duty | Continuous |
|---|---|
| Enclosure Type | TEFC |
| Frame | 256T |
| Frame Material | Cast Iron |
| Frequency | 60 Hz |
| Full Load Amps | 23.7 A |
| Horsepower | 20 HP |
| Mounting | Rigid |
| Phase | Three |
| Power | 20 HP |
| Speed | 3540 RPM |
| Voltage | 460V |
Product details
| Manufacturer | Marathon |
|---|---|
| Manufacturer part number | W551A |
| Product category | Electric Motors |
| Published specifications | 12 attributes listed |
| Related part numbers | 2 other part numbers 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 W551A cost?
W551A is listed at CA$4,240.97 (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 W551A?
W551A 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 W551A, and the quote confirms condition and lead time before you order.
Is the W551A 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 W551A, 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 W551A?
No published lifecycle status is on file for W551A. 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 W551A?
Key specifications include Duty: Continuous; Enclosure Type: TEFC; Frame: 256T; Frame Material: Cast Iron. The full specification table on this page lists every published attribute for this part.
What voltage does W551A use?
Per the published specification for W551A: Voltage: 460V. Confirm against the full specification table on this page, or ask our order desk to verify it with the manufacturer at quote time.
What is the power rating of W551A?
Per the published specification for W551A: 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 quickly can W551A ship?
Lead time for W551A 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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