Marathon
Marathon S557A - 3 HP, TEFC, Frame 213T
Model: S557A
Marathon S557A motor — 3 HP, 3-phase, 575 V, 1200 RPM, 213T frame, TEFC, 89.5% efficiency.
Technical Specifications
| Horsepower (HP) | 3 |
| Frame Size | 213T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1200 |
| Voltage | 575 |
| Phase | 3 |
| Full Load Amps (A) | 3.5 |
| Weight (lbs) | 175 |
| Category | Definite Purpose |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 89.5 |
| Shaft Diameter | 1.375 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.132 |
| Duty Type | General Purpose |
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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