Dayton
Dayton 4YU27 1/4 HP 1725 RPM 115V PSC Motor hvac control
Permanent split capacitor motor delivers 1/4 hp at 1,725 RPM on 115 V AC for HVAC fan and blower applications
- 1/4 HP PSC motor delivers 1725 RPM for reliable airflow
- 115 V single-phase operation suits standard residential wiring
- 6 A full-load current allows straightforward circuit planning
- Auto thermal protection and Class B insulation support continuous duty
- Replaces multiple OEM part numbers including 2RB87 and 4HZ series
Dayton 4YU27 Motor Applications
The Dayton 4YU27 is a single-phase permanent split capacitor motor rated at 1/4 hp and 1725 RPM for 115V AC operation. It suits HVAC fan and blower duties where continuous duty and automatic thermal protection are required.
Voltage Constraints and Replacement Coverage
The motor is explicitly not usable at 208V or 200V, so installers must confirm a 115V supply before fitting. It directly replaces part numbers 2RB87, 4HZ37G, 4HZ39G, 4HZ41G, 4HZ43G and 5DVT0, simplifying sourcing for maintenance teams.
Capacity and Thermal Headroom
Continuous duty at 3.6 A full-load amps is supported up to a maximum ambient temperature of 40 Degrees C with Class B insulation. The 1.0 service factor leaves no overload margin, so the motor runs out of headroom if airflow is restricted or voltage sags below nominal.
Highlights
- 1/4 HP PSC motor delivers 1725 RPM for reliable airflow
- 115 V single-phase operation suits standard residential wiring
- 6 A full-load current allows straightforward circuit planning
- Auto thermal protection and Class B insulation support continuous duty
- Replaces multiple OEM part numbers including 2RB87 and 4HZ series
Specifications
| Brand | DAYTON |
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Questions about this item
Will the 48Y frame bearings need scheduled lubrication or replacement?
The motor uses a permanent split capacitor design with auto thermal protection and runs continuous duty at 1725 RPM, so the sealed bearings are not user-serviceable and replacement means swapping the entire unit.
What stops the 1/4 HP motor first when it runs non-stop at 115 V?
The 3.6 A full-load current combined with a 1.0 service factor and 40 °C max ambient means thermal overload will trip before mechanical wear becomes the limit.
How much heat and noise does the 48Y frame PSC motor add in all-day HVAC service?
With Class B insulation, continuous duty rating and auto-reset thermal protection, the motor dissipates its rated 1/4 HP loss as heat and runs at typical PSC fan-motor noise levels.
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