If you need a 5 HP motor on a 184T frame, the first decision is power: three-phase versus single-phase. That choice drives everything else-enclosure, wiring, and the type of equipment you can run. The two motors here take opposite paths: one is built for three-phase industrial power with a sealed, severe-duty design, and the other is a single-phase replacement aimed specifically at air compressors. Matching the motor to your power supply and workspace is the whole game.
Quick Verdict
Choose the 3-phase severe duty motor if you have three-phase power available and want a lower listed price, a TEFC/IP55 enclosure, and a design rated for demanding environments. Choose the single-phase air compressor motor if you need a direct-fit replacement for a single-phase compressor and prefer the listed 2-year manufacturer warranty.
| Feature | 3-Phase Severe Duty | Single-Phase Air Compressor |
|---|---|---|
| Listed price | USD 330.95 | USD 455.00 |
| Motor phase | Three phase | Single phase |
| Voltage | 230/460V | 208-230V |
| Enclosure | TEFC/IP55 | ODTF |
| Design intent | Severe duty | Air compressor direct replacement |
| Frame | 184T | 184T |
Where Each Motor Wins
The 3-phase motor is the budget pick at $124.05 less, and it packs features that matter in gritty, humid, or wash-down environments: a totally enclosed fan-cooled enclosure rated IP55, a 1.15 service factor, Class F insulation, and bi-directional rotation. The dual-voltage rating (230/460V) also gives you wiring flexibility in a three-phase setup. It runs at 1800 RPM and handles heavy-duty jobs like pumps, conveyors, and compressors.
The single-phase motor is the convenience winner for typical shop or home air compressors that run on single-phase power. It's specified as a direct replacement for an 184T frame, uses a steel construction, draws 28.5-27.0 amps, and comes with a 2-year manufacturer warranty. If you already have a single-phase compressor head and need a bolt-on motor, this removes the three-phase requirement entirely.
1800 RPM 5 HP Electric Motor 184T Frame TEFC 230/460V Severe Duty 3 Phase
This motor is for three-phase industrial settings where reliability under load is non-negotiable. The TEFC/IP55 enclosure keeps dust and water spray away from the windings, and the severe-duty rating (including a 1.15 service factor) means it can handle brief overloads without breaking a sweat. The 230/460V dual-voltage wiring is a practical plus when you're working with different three-phase mains. It also rotates in either direction, which simplifies installation on equipment that may require a specific spin.
The trade-off is that it's locked to three-phase power. If you only have a single-phase supply, this motor won't run. It's also not positioned as a specific air compressor replacement, so you'll need to check your compressor's mounting and shaft specs-the motor itself is a heavy-duty 104 lb unit with a 1-1/8" keyed shaft.
1 Piece 5 HP Single Phase Industrial Air Compressor Electric Motor 184T Frame
This motor is designed to drop into a single-phase industrial air compressor application. The 184T frame and ODTF enclosure match the common compressor motor layout, and the 208-230V rating suits many single-phase shop compressors. The listing highlights a direct replacement fitment, which is a plus if you want a straightforward swap. The 2-year manufacturer warranty is a solid piece of buyer protection, and the steel construction fits the industrial mood.
Its main drawback is the higher listed price and the narrower voltage window-there's no 460V option here. And ODTF is an open design, so it's less enclosed than the TEFC motor; if your compressor sits in a very dusty or wet spot, the 3-phase TEFC motor offers more enclosure strength.
Final Choice by Use Case
- You have three-phase power and want maximum toughness per dollar: go with the 1800 RPM 3-phase severe duty motor at $330.95. It's the lower-priced option, and its sealed, dual-voltage, bi-directional design makes it a flexible workhorse.
- You need a single-phase replacement for a 184T air compressor and value a listed 2-year warranty: the single-phase ODTF motor at $455.00 is the direct-fit route. Just confirm your compressor's duty cycle and running conditions, because it's less sealed than the TEFC alternative.
Match the motor to your power phase and environment, and either choice will move your equipment.
