Dayton
Dayton 30PT51 1/4 hp 115/230V AC Capacitor-Start/Run Motor
Single-phase capacitor-start/run motor delivers 1/4 hp at 1,140 rpm on 115/230 V AC with a 56 frame and 1.35 service factor
- typeClosed Base
- 1/4 hp output powers light-duty equipment
- 115/230V dual-voltage suits varied supplies
- Capacitor-start/run design gives efficient single-phase operation
- 56 frame fits standard mounting patterns
- Open drip-proof enclosure resists falling moisture
Application Fit
The Dayton 30PT51 is a 1/4 hp single-phase AC motor built for general-purpose industrial and commercial equipment. It suits conveyor drives, fan assemblies and pump units that require a fixed-speed, capacitor-start/run machine rated for continuous duty. Buyers needing variable-speed control via an inverter or a motor with integrated thermal overload protection should look elsewhere.
Sustained Operation
Rated for continuous duty at a 1.35 service factor, the motor delivers 140 RPM under full load with a maximum ambient temperature of 40 °C. Insulation Class B and an open drip-proof enclosure handle steady heat dissipation in horizontal mounting, while the absence of thermal protection means external safeguards are required for prolonged high-load cycles.
Voltage Flexibility
Dual-voltage 115/230 V AC input allows the motor to be wired for either supply by reconfiguring the terminal connections. Full-load current draws 3.7 A at 115 V and 1.9 A at 230 V, so the installer must select the correct voltage tap and branch-circuit protection before commissioning.
Highlights
- 1/4 hp output powers light-duty equipment
- 115/230V dual-voltage suits varied supplies
- Capacitor-start/run design gives efficient single-phase operation
- 56 frame fits standard mounting patterns
- Open drip-proof enclosure resists falling moisture
Specifications
| Brand | DAYTON |
|---|---|
| type | Closed Base |
Questions about this item
How loud or hot does this 1/4 hp motor get when running continuously at 40 °C ambient?
The motor is rated for continuous duty at up to 40 °C ambient with Class B insulation and no built-in thermal protection; noise and surface temperature will depend on the driven load and ventilation.
What voltage supply and starter components are needed to run this 115/230 V capacitor-start/run motor?
A single-phase 115 V or 230 V AC supply at 60 Hz is required; the motor includes its own start and run capacitors, so no external starter or contactor is needed.
Will this 56-frame, 140 RPM motor bolt onto my existing cradle-base mounting and match the shaft rotation?
Yes — it uses a 56-frame cradle base for horizontal mounting and the shaft rotates CW/CCW, so it can replace an existing motor with the same frame, base and reversible rotation.
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