US Motors 1874 K55HXSRD-4515 Condenser Fan Motor 208/230V 825RPM 48Y 1/4–1/8HP TENV

Condition: New; run capacitor not supplied (requires 5µF 370VAC).

This US Motors / Nidec condenser fan motor is a dedicated outdoor-unit motor designed to drive a condenser fan blade in air-over applications (typical split-system AC or heat pump condensing sections). It’s a single-phase, 208/230VAC, 60Hz motor with a 48Y frame and stud mounting, built with a TENV enclosure and thermal protection for reliable long-season operation. Rotation is reversible via lead interchange, making it a practical service replacement when OEM rotation requirements vary by unit.

Key Specifications (from nameplate/box)

• Manufacturer / Brand: US Motors (Nidec Motor Corporation)
• Catalog / Part No.: 1874
• Model: K55HXSRD-4515
• Type: Condenser fan motor (air-over)
• Horsepower: 1/4 – 1/8 HP
• Voltage: 208/230 VAC
• Frequency: 60 Hz
• Phase: 1
• Speed: 825 RPM
• Current: 2.0 A
• Frame: 48Y
• Enclosure: TENV (Totally Enclosed Non-Ventilated)
• Motor protection: Thermally Protected
• Mounting: Stud mount
• Bearing (label shows): “SAB” (commonly indicates sleeve/bearing style in many HVAC motors—verify if your application demands ball bearings)
• Ambient rating (label): 60°C
• Required run capacitor: 5.0 µF, 370 VAC (not included)
• Rotation (as marked): CCW Lead End (reversible)
• Motor Shaft Rotation (requested format): CWSE/CCWLE (because it’s CCW when viewed from the lead end; opposite when viewed from the shaft end)

Wiring / Rotation Notes (service-friendly)

• Typical 208–230V connections: Black = L1, White = L2 (per diagram on motor label)
• Capacitor leads: Brown and Brown/White stripe to 5µF 370VAC run capacitor
• To reverse rotation: interchange ORG and YEL leads (per label instruction)

Features

• Designed for condenser duty (air-over): optimized for outdoor fan sections
• Reversible rotation via simple lead swap (useful across multiple OEM designs)
• Thermally protected for overload resilience
• TENV enclosure helps keep windings sealed from direct airflow contaminants
• 48Y frame compatibility with many HVAC condenser motor mounts and fan hubs
• Stud mounting for fast drop-in replacement on many top-grille and bracket setups
• Uses a common, economical capacitor value (5µF 370VAC)

Applications and Spheres of Use

• Residential and light commercial AC condensing units
• Heat pump outdoor sections
• HVAC condenser fan blade drive (air-over condenser compartment)
• Service replacement motor for OEM condenser fan assemblies

Cross-Referenced Models (as shown on box)

Organized list of identifiers and stated “use for” references:

• US Motors 1874
• K55HXSRD-4515
• S39-127
• MOT06039
• 98N02

Comparable Products (similar class/service replacement)

When matching, prioritize frame (48Y), RPM (825), HP range, voltage, capacitor (5µF), mounting style, and rotation needs.

• Century (A.O. Smith) / Regal Rexnord 48Y condenser fan motors (825 RPM class)
• Genteq 48Y condenser fan motors in the 825 RPM / 208–230V range
• Fasco 48Y condenser fan motors with 5µF capacitor requirements
• Marathon condenser fan motors with equivalent electrical/mechanical specs

Works As Part of Larger HVAC Assemblies

This motor is typically installed as part of the outdoor fan system, which includes:

• Fan blade (matched by diameter/pitch and hub bore)
• Top grille or fan shroud
• Run capacitor (5µF 370VAC required here)
• Contactor / defrost board (heat pump) and control wiring
• Condenser coil & compressor compartment airflow design

Compatibility tip: Even when electrical specs match, confirm:

• Shaft diameter/length and hub fit
• Mounting stud spacing and belly-band/bracket style (if applicable)
• Required rotation direction as viewed from the correct end
• Capacitor µF and voltage rating

Related

• condenser fan motor 48Y
• 208/230V single phase fan motor
• 825 RPM outdoor unit motor
• 5 MFD 370V run capacitor required (cap not included)
• stud mount condenser motor
• air-over HVAC motor
• reversible rotation fan motor (swap orange/yellow leads)
• outdoor AC unit fan drive motor
• replacement for S39-127 / MOT06039 / 98N02
• device to move air through condenser coil (outdoor fan motor)

Common Requests:

1. “Need a US Motors 1874 condenser fan motor replacement with 825 RPM”
2. “What capacitor does K55HXSRD-4515 use? (5µF 370V?)”
3. “Looking for a 48Y 208/230V condenser fan motor with stud mounts”
4. “How do I reverse rotation on a US Motors condenser fan motor (ORG/YEL swap)?”
5. “Cross reference S39-127 or 98N02 condenser fan motor equivalent”

P126; HT9; GT00156