Best Universal Bathroom Fan Motor Replacements for 50 CFM 120V
The right replacement motor can restore quiet, reliable exhaust in a bathroom. This guide highlights five universal SM550 motor kits that replace common Nu-Tone/Broan models and similar brands. Each option is compatible with popular configurations, offers straightforward installation, and supports 50 CFM, 120V operation at 3000 RPM. Below you’ll find concise sections for each product, followed by a practical buying guide to compare features, compatibility, and installation considerations.
Summary of Selected Products
| Product | Brand | Key Features |
|---|---|---|
| Universal Bathroom Fan Motor Replacement SM550 Kit | PANDEELS | 60 Hz, 120V, 50 CFM, 3000 RPM, includes blade, 6″ wire, universal replacement |
| AMI PARTS Universal Vent Fan Motor Kit SM550 | AMI PARTS | Replaces SM550 and multiple model numbers, 4.5″ blade, 6″ wire, 2-prong plug |
| Siasky Universal Vent Motor Kit | Siasky | Quiet operation, 50 CFM, 3000 RPM, balanced coil, broad compatibility |
| FRIGESWIFT SM550 Universal Motor Kit | FRIGESWIFT | CCW/CW reversible, 4.5″ blade, 1 7/8″ mounting centers, multiple replacements |
| 2 Pack PANDEELS SM550 Replacement Kit | PANDEELS | Two-motor kit, 4.5″ blade, 6″ wire, plug, universal compatibility |
Universal Bathroom Fan Motor Replacement SM550 Kit — PANDEELS
The PANDEELS SM550 kit is a universal replacement for common Nu-Tone/Broan units, delivering 50 CFM at 120V with a 3000 RPM rating. The kit includes a 4 1/2″ blade and a shaft roughly 3/16″ x 1 3/4″, with a 6″ wire and a two-prong plug. Mounting studs are spaced 1 7/8″ on center, and the coil stack is 5/8″. This model supports multiple past part numbers, enabling flexible compatibility across brands, including Nutone, Broan, and Sears family lines.
Key considerations: verify your old part numbers (EM550/C01575/65100, EM750, VFM100, etc.) match listed replacements; confirm your mounting footprint and blade size before purchase; ensure the shaft and plug wiring align with your existing cabinet setup.
AMI PARTS Universal Bathroom Vent Fan Motor Kit SM550
AMI PARTS offers a SM550 motor replacement that fits Nu-Tone/Broan and related models, delivering 50 CFM at 120V and 3000 RPM. The blade is 4 1/2″ in diameter with a 1″ height, shaft about 3/16″ by 1 3/4″. A 6″ wire length and a 2-prong plug are included, with mounting studs spaced 1 7/8″ apart. The kit is designed to replace SM550, C01575, EM550, EM750, and other compatible numbers, making it a practical option for many older bathrooms.
Installation notes: ensure power is off, align the new motor with the existing housing, and follow the included mounting dimensions to avoid misalignment or vibration. If your current unit uses a different blade style, confirm compatibility with the 4 1/2″ blade provided.
Siasky Universal Bathroom Vent Motor Kit
Siasky’s motor kit targets Nu-Tone and Broan compatibility with a 50 CFM, 120V operation at 3000 RPM. The design emphasizes quiet performance, with a precision-balanced 5/8 coil pack and an aerodynamic blade that keeps noise under 1.5 sones. The motor shaft is approximately 3/16″ x 1 3/4″, and the wire length is 6″ with a 2-prong plug. The unit notes broad compatibility with replacement models across multiple brands, making it adaptable for various bathroom exhaust systems.
Prospective buyers should verify the shaft diameter and blade thickness against the existing hardware, and confirm compatibility with your unit’s mounting studs (1 7/8″ center spacing).
FRIGESWIFT SM550 Universal Motor Kit
FRIGESWIFT provides a reversible SM550 motor kit (CW/CCW) for 50 CFM, 120V, 3000 RPM applications. The blade is 4 1/2″ in diameter with a 1″ height, shaft is 3/16″ x 1 3/4″, and uses a 6″ wire with a 2-prong plug. Mounting studs are 1 7/8″ on center, with a 5/8″ coil stack. This kit replaces multiple models including EM550, EM750, 65100, and C65878, and is compatible with Nutone Broan, Uppco, Ventorola E498-1, and others.
When evaluating this option, consider your existing housing’s internal clearance and any heat considerations in small bathroom spaces. The reversible feature is useful if you need to change rotation direction for compatibility with your fan assembly.
2 Pack PANDEELS SM550 Replacement Kit
This two-pack from PANDEELS includes two SM550 motors with 4 1/2″ blades, 3/16″ x 1 3/4″ shafts, and 6″ wires with two-prong plugs. The kit is designed for Nu-Tone Broan 50 CFM 120V applications and replaces models 65100, C65878, VFM100, E498-1, 82423K, K111, EM550, and EM750. Each motor runs at 3000 RPM, 60 Hz, and 0.29A. The set is suitable for retrofits or replacements in multiple bathrooms or units that require two motors for parallel installations.
Practical notes: ensure both motors align with your existing housings and confirm that your wiring and plug type are compatible. A two-pack can be advantageous for multi-bathroom updates or spare parts in maintenance cycles.
Buying Guide: Key Purchase Considerations
When choosing a universal SM550 replacement motor, these factors help ensure compatibility and performance:
- Model compatibility: match the old part numbers (for example, EM550, EM750, C01575, 65100, C65878, VFM100, E498-1) to the replacement kit. Cross-check the list of supported brands and models.
- Electrical specs: confirm 120V, 60 Hz, and the rated current (around 0.29A) to ensure proper electrical compatibility with your home circuit and blower control.
- Airflow and RPM: 50 CFM at 3000 RPM is common for these kits. Verify that the target airflow meets your bathroom size and ventilation needs.
- Physical dimensions: blade diameter (4 1/2″), blade height (1″), shaft size (3/16″ x 1 3/4″), and wire length (6″) with a 2-prong plug. Mounting stud spacing is typically 1 7/8″ on center.
- Installation complexity: most kits are designed for straightforward replacement, but verify that the housing fits the blade and shaft in your unit to avoid clearance issues or vibration.
- Noise expectations: look for precision-balanced blades and coil packs to minimize operation noise; some models emphasize lower sones for quiet operation.
- Quantity needs: single replacements vs. two-pack kits. A two-pack can be useful for multiple baths or future replacements.
Additional considerations include the inclusion of a plug vs. bare wire, the ease of wiring during installation, and compatibility with existing mounting studs and center spacing. Always disconnect power before starting installation and consult your unit’s manual or a professional if you are unsure about wiring or mounting specifics.