Marathon
Marathon H958 - 20 HP, TEFC, Frame 256T
Model: H958
Marathon H958 motor — 20 HP, 3-phase, 200/400 V, 1500 RPM, 256T frame, TEFC, 89.5% efficiency.
Technical Specifications
| Horsepower (HP) | 20 |
| Frame Size | 256T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1500 |
| Voltage | 200/400 |
| Phase | 3 |
| Full Load Amps (A) | 57.0/28.5 |
| Weight (lbs) | 225 |
| Category | Definite Purpose |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 89.5 |
| Duty Type | Brake |
| Shaft Diameter | 1.625 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.134 |
| IP Rating | IP55 |
| Ip Rating Source | Marathon 2026 Catalog p.134 |
| Service Factor | 1.15 |
| Service Factor Source | Marathon 2026 Catalog p.134 |
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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