MARATHON MOTORS 5K35MNN117A Electric Motor Cat Fan Rpm 5K35MNB117A Cat. K158 230V 1/2 1725

( Brand: Marathon Motors ), ( Manufacturer Part Number: 5K35MNN117A ), ( Model: 5K35MNB117A ), ( Part Type: Fan 230v Hp Motor ), ( Power Source: Corded Electric ), ( Voltage: 190/380 )

Review MARATHON MOTORS Electric Motor Cat. Fan 230v 1/2 Hp Rpm

The **Marathon 5K35MNN117A** and **5K35MNB117A** electric motors are high-performance, industrial-grade single-phase induction motors designed for demanding applications requiring reliability, efficiency, and durability. These motors are engineered under strict quality standards, making them ideal for a wide range of mechanical systems, including industrial fans, pumps, compressors, and conveyor belts. The **5K35MNN117A** features a **NEMA 56C frame**, a standard size that balances compactness with robust power delivery, while the **5K35MNB117A** incorporates a **NEMA 56B frame**, offering slightly different mounting and shaft configurations for tailored application needs. Both motors operate at a nominal voltage of **230V**, ensuring compatibility with standard industrial power supplies while delivering consistent performance across varying load conditions.

Powering these motors is a **1/2 horsepower (0.5 HP)** electric motor, providing sufficient torque and rotational force for moderate to heavy-duty applications without excessive energy consumption. The motors operate at a standard speed of **1725 RPM**, striking an optimal balance between efficiency and performance, making them suitable for applications where smooth, steady operation is critical. The **K158** designation refers to the motor s **capacitor-start, capacitor-run (CSCR)** single-phase induction design, which ensures reliable starting torque and continuous operation with minimal energy loss. This configuration is particularly advantageous in environments where frequent starts or variable loads are common, as it eliminates the need for external starting mechanisms while maintaining high efficiency.

Constructed with **high-quality materials**, these motors feature a robust **die-cast aluminum housing** that resists corrosion, vibration, and thermal stress, ensuring longevity even in harsh operating conditions. The **ball-bearing support system** provides smooth, low-friction operation, reducing wear and extending the motor s service life. Additionally, the motors are equipped with **insulated windings** and **Class B temperature rise**, meeting or exceeding NEMA and IEC standards for thermal protection, which helps prevent overheating and extends component lifespan. The **sleeve bearing** design in the **5K35MNN117A** variant offers a balance of durability and maintenance simplicity, while the **ball bearing** in the **5K35MNB117A** variant enhances precision and reduces operational noise, making it ideal for applications requiring quieter operation.

Both motors are designed for easy integration into existing systems, featuring **standard NEMA 56 mounting dimensions** that allow for straightforward installation on conveyor systems, fans, or other mechanical assemblies. The **shaft extension** is precision-machined for optimal alignment with connected equipment, minimizing vibration and ensuring efficient power transfer. Whether used in **industrial ventilation systems, HVAC applications, or light-duty manufacturing processes**, these motors deliver consistent performance with minimal maintenance requirements. Their **energy-efficient design** also contributes to lower operational costs, making them a cost-effective solution for businesses seeking reliable, long-lasting electric motors without compromising on performance.

For applications where **fan performance is critical**, these motors can be paired with **Marathon s 230V fan models**, such as the **5K35 series**, to create a cohesive, high-efficiency system. The combination of the motor s **1725 RPM output** and the fan s aerodynamic design ensures optimal airflow while maintaining energy efficiency. Whether in **commercial buildings, industrial plants, or agricultural settings**, these motors provide the power and reliability needed to keep systems running smoothly with minimal downtime. With their **durable construction, efficient operation, and versatile compatibility**, the **Marathon 5K35MNN117A** and **5K35MNB117A** motors are a dependable choice for engineers and operators seeking a balance of performance, longevity, and ease of use.

### **Pros and Cons of buying a Marathon 5K35MNN117A (1/2 HP, 1725 RPM, 230V) Electric Motor with Cat K158 Fan**

1. **Reliable Brand** Marathon is a well-known manufacturer of electric motors and fans, offering durable and long-lasting products with a reputation for quality.

2. **Standard Specifications** The 1/2 HP (373W) motor is a common industrial rating, making it suitable for general-purpose applications like ventilation, cooling, or small machinery.

3. **1725 RPM** This speed is ideal for many standard fan and blower applications, providing a good balance between airflow and efficiency without excessive noise.

4. **230V Compatibility** Works well in regions where 230V power is standard, reducing the need for voltage converters in most cases.

5. **Cat K158 Fan Integration** The motor is paired with a compatible fan (Cat K158), ensuring proper matching for airflow and performance without compatibility issues.

6. **Cost-Effective** As a mid-range motor, it offers a balance between price and performance, making it a budget-friendly option for small to medium industrial or commercial use.

7. **Easy Installation** Standard mounting options and wiring make it straightforward to install in existing systems.

8. **Energy Efficiency** While not the most advanced, it operates efficiently for its class, helping reduce energy costs compared to older, less efficient motors.

9. **Widely Available** Parts and replacements are likely to be accessible due to its popularity and widespread use.

10. **Versatile Applications** Suitable for exhaust fans, cooling systems, small HVAC units, or other low-to-medium load applications.

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1. **Limited Power for Heavy-Duty Use** At only 1/2 HP, it may struggle with high-resistance applications, such as large ductwork, high-static-pressure systems, or heavy industrial machinery.

2. **No Variable Speed Control (VSCR) Compatibility** If you need adjustable speed for energy savings or noise reduction, this motor may require additional components (like a VFD), adding cost.

3. **Basic Construction** Likely a standard TEFC (Totally Enclosed Fan-Cooled) motor, which means it relies on airflow for cooling. In dusty or corrosive environments, it may require additional protection (e.g., NEMA 4 or explosion-proof variants).

4. **Noise Levels** While not excessively loud, a 1725 RPM motor may produce noticeable fan noise in quiet environments unless properly insulated.

5. **Lifespan Dependent on Maintenance** Like all motors, it requires regular upkeep (lubrication, cleaning, tension checks) to avoid premature failure.

6. **Not Ideal for Extreme Conditions** Exposure to high humidity, chemicals, or extreme temperatures may reduce its lifespan unless properly sealed or protected.

7. **Limited Warranty** Standard warranties (typically 1 2 years) may not cover all potential issues, especially in harsh operating conditions.

8. **Potential Compatibility Issues** While paired with a Cat K158 fan, ensure the application s airflow requirements match the motor s capacity to avoid inefficiencies.

9. **No Built-in Overload Protection** Some motors include thermal protection; if this one lacks it, additional safeguards (like circuit breakers) may be necessary.

10. **Resale Value** As a generic industrial motor, it may not hold significant resale value compared to specialized or high-efficiency models.

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The **Marathon 5K35MNN117A (1/2 HP, 1725 RPM, 230V) motor with Cat K158 fan** is a **practical, cost-effective choice** for **light to medium-duty applications** such as ventilation, cooling, or small-scale industrial use. It offers **reliability, ease of installation, and compatibility with standard systems**, making it a solid option for budget-conscious buyers who prioritize functionality over advanced features.

However, it is **not ideal for high-load, high-static-pressure, or extreme-environment applications**. If your use case involves **heavy-duty work, variable speed control needs, or harsh conditions**, you may need to invest in a **higher horsepower motor, explosion-proof model, or a motor with built-in protections**.

For **general-purpose fans, exhaust systems, or small HVAC setups**, this motor delivers **good performance at a reasonable price**, provided it is properly maintained.

- You need a **reliable, mid-range motor** for **standard ventilation or cooling tasks**.

- Your application involves **low to moderate airflow resistance**.

- You are working within a **230V electrical system** and do not require variable speed control.

- Budget is a **primary consideration**, and you can afford basic maintenance.

- You require **higher horsepower (e.g., 1 HP or more)** for demanding applications.

- Your environment involves **dust, moisture, or chemicals**, necessitating a **NEMA 4 or explosion-proof motor**.

- You need **variable speed control**, which would require a **VFD-compatible motor**.

- Noise reduction is critical, and you may need a **lower RPM or insulated motor**.

- You anticipate **long-term heavy use**, and a **premium or high-efficiency motor** would justify the higher cost.

For most **basic to moderate applications**, this motor is a **sound investment**. For specialized or high-stress environments, research **higher-end or application-specific alternatives** to ensure optimal performance.

Details:

voltage : Dual voltage capacity of 208-230/460V 60 Hz or 190/380V 50 Hz, 3-phase. Condition is used. Though used, item is fully operational and functional. May have some minor cosmetic blemishes.

Power Output: Dual rating of 1/2 HP at 60 Hz and 1/3 50. Speed: 1725 RPM 60 Hz or 1425 50 Hz. Marathon Electric AC motor Catalog Number K158, model 5K35MNB117A designed for industrial or commercial use.

part #: 5k35mnn117a prices

• $56.67-$299.99

specifications fablowehva:

• brand: Marathon Motors
• mpn: 5k35mnn117a
• model: 5k35mnb117a
• part type: Fan 230v Hp Motor
• power source: Corded Electric
• voltage: 190/380

payments fablowehva:

• other
• credit card: Mastercard
• wallet: Apple-pay

returns fablowehva:

• policy: No Returns

general fablowehva:

• condition: Used
• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Fans Blowers

seller fablowehva:

• rating: 99.2%
• # reviews: 4209
• city: Brick, New Jersey

shipping fablowehva:

• service: USPS Ground Advantage
• carrier: USPS
• cost: $35.80
• class: Standard
• type: Calculated
• transit: 5-11 Days

offer fablowehva:

• started: February 26, 2026
• availability: In Stock
• quantity: 4
• sold: 0
• options: Ship-to-home

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