Marathon
Marathon E643B - 50 HP, TEFC, Frame 365T
Model: E643B
Marathon E643B motor — 50 HP, 3-phase, 460 V, 1200 RPM, 365T frame, TEFC, 94.1% efficiency.
Technical Specifications
| Horsepower (HP) | 50 |
| Frame Size | 365T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1200 |
| Voltage | 460 |
| Phase | 3 |
| Full Load Amps (A) | 60.5 |
| Weight (lbs) | 987 |
| Category | Severe Duty |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 94.1 |
| Shaft Diameter | 2.375 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.53 |
| 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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