Marathon
Marathon W554A - 20 HP, TEFC, Frame 256T
Model: W554A
Marathon W554A motor — 20 HP, 3-phase, 575 V, 1800 RPM, 256T frame, TEFC, 93.0% efficiency.
Technical Specifications
| Horsepower (HP) | 20 |
| Frame Size | 256T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1800 |
| Voltage | 575 |
| Phase | 3 |
| Full Load Amps (A) | 19.4 |
| Weight (lbs) | 320 |
| Category | Severe Duty |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 93.0 |
| Duty Type | Severe Duty |
| Shaft Diameter | 1.625 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.57 |
Manufacturer
Marathon
A Regal Rexnord brand manufacturing industrial-grade electric motors. Known for Blue Chip XRI, Black Max, and severe duty product lines.
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