Dayton
Dayton 4YFJ3 Unit Bearing Motor 1/185 hp HVAC Control
A shaded-pole unit bearing motor delivers 1/185 hp at 550 rpm for HVAC controls
- ColorTransparent
- Dayton unit bearing motor rated 1/185 hp for compact HVAC applications
- Shaded-pole single-phase design delivers 4 W output at 1550 RPM
- 115 V AC operation draws only 0.34 A full-load current
- Totally enclosed air-over cast aluminium frame suits horizontal or vertical shaft-up mounting
- Impedance thermal protection and Class A insulation rated for 40 °C ambient
Motor type and intended use
The Dayton 4YFJ3 is a single-phase shaded-pole unit bearing motor rated at 1/185 hp and 4 W output. It runs on 115 V AC at 60/50 Hz with a full-load current of 0.34 A and a nameplate speed of 550 rpm. The motor is built for HVAC control applications where a compact, low-power drive is required.
Mounting and system fit
The cast-aluminium frame uses a rear/foot mounting pattern and accepts horizontal or vertical shaft-up orientation. Its totally enclosed air-over enclosure relies on the surrounding airflow for cooling, so the installer must ensure the motor sits in the airstream of the equipment. Impedance thermal protection and Class A insulation are integrated, removing the need for an external overload device in many installations.
Sustained-load behaviour
Continuous operation is rated at a maximum ambient temperature of 40 degrees C with a service factor of 1, meaning the motor delivers its nameplate output without overload margin. Rotation is fixed counter-clockwise when viewed from the lead end, so the driven component must match that direction. The shaded-pole design provides quiet, low-torque running suited to constant-speed fan or damper duties rather than frequent starting cycles.
Highlights
- Dayton unit bearing motor rated 1/185 hp for compact HVAC applications
- Shaded-pole single-phase design delivers 4 W output at 1550 RPM
- 115 V AC operation draws only 0.34 A full-load current
- Totally enclosed air-over cast aluminium frame suits horizontal or vertical shaft-up mounting
- Impedance thermal protection and Class A insulation rated for 40 °C ambient
Specifications
| Brand | DAYTON |
|---|---|
| Color | Transparent |
Questions about this item
What is the maximum ambient temperature the 1/185 hp shaded-pole motor can tolerate before thermal protection trips?
The motor's impedance thermal protection is rated for a maximum ambient temperature of 40 degrees Celsius, suitable for typical HVAC enclosure environments.
How much current does the unit-bearing motor draw during continuous 115 V AC operation at 60 Hz?
At full load the motor draws 0.34 amps at 115 V AC, 60 Hz, resulting in low steady-state heat dissipation inside the cabinet.
Which mounting orientation and hardware does the cast-aluminium frame require for installation?
The rear/foot-mounted frame supports horizontal or vertical shaft-up positioning, so existing HVAC brackets matching the non-standard frame pattern are needed.
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