Dayton 5PHA7A Capacitor-Start Motor 3/4 hp 115/230V 450 RPM
Single-phase capacitor-start motor delivers 3/4 hp at 450 RPM on 115/230V AC with auto thermal protection and reversible rotation
- Product typeClosed Base
- 3/4 hp capacitor-start torque for reliable single-phase starting
- Dual 115/230 V operation fits standard shop wiring
- 450 RPM output suits low-speed drive requirements
- Totally enclosed fan-cooled frame runs continuously at 40 °C ambient
- Auto thermal protection and reversible CW/CCW rotation simplify installation
3/4 hp Capacitor-Start Motor
The Dayton 5PHA7A is a single-phase capacitor-start motor rated at 3/4 hp with a nameplate speed of 450 RPM. It operates on dual-voltage 115/230V AC at 60 Hz and draws 10.1 or 5.1 amps at full load. The 56 frame size and keyed shaft suit general-purpose industrial machinery requiring constant torque.
Replaces worn single-speed motors
This unit serves as a direct replacement for failed capacitor-start motors in pumps, compressors, or conveyors where a 56 frame and 450 RPM output match the original specification. The jump is worth it when the existing motor shows insulation breakdown, bearing noise, or thermal-tripping under continuous duty at 40 degrees C ambient.
Cradle-base mounting simplifies installation
The cradle base allows all-angle mounting without shims, and the reversible CW/CCW rotation is set by swapping two leads inside the terminal box. Auto thermal protection resets itself after cooling, but miswiring the dual-voltage links or neglecting the start capacitor are the common errors that prevent the motor from reaching full speed.
How it compares
Measured against everything we stock in Industrial Motors & Machine Parts, at today’s prices. Recalculated every night.
- Price $279.99
- Pricier than about 66% of the 397 comparable items (median $91.99).
Specifications
| Product | |
|---|---|
| Brand name | DAYTON |
| Product type | Closed Base |
Questions about this item
What frame size and shaft design does the 5PHA7A motor use for mounting?
The motor uses a 56 frame with a keyed shaft for secure coupling to driven equipment.
How do I wire the dual-voltage motor for 115 V or 230 V operation?
Follow the wiring diagram on the nameplate to reconfigure the internal leads for the required 115 V or 230 V supply.
What ongoing maintenance does the totally enclosed fan-cooled design require?
Periodically clean the external cooling fins and verify the automatic thermal protection resets correctly after any overload event.
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