MARATHON 56T17D15631A Phase Induction Motor Rpm Drip 3/2 1725/1425

( Brand: Marathon ), ( Manufacturer Part Number: 56T17D15631A ), ( Part Type: Hp Motor ), ( Actual Rated Input Voltage: 208-230/460, 190/380-415 ), ( Full Load Amps: 4.9-2.4/4.9-2.4 ), ( Nema Design Letter: Design B ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60/50 Hz ), ( Enclosure Type: Open Drip-proof ), ( Base Rpm: 1725/1425 ), ( Ac Motor Type: Induction/asynchronous ), ( Current Type: Ac ), ( Protection Against Liquids: Dripping Water When Tilted ), ( Ip Rating: Ip22 ), ( Service Factor: 1.15 ), ( Ac Phase: Three Phase ), ( Protection Against Solids: Gentle Prodding )

Review MARATHON 3/2 Hp Three Phase Induction Motor 1725/1425 Rpm Open Drip proof

The **Marathon 56T17D15631A** is a robust, high-performance **3/4 horsepower (0.75 HP) single-phase induction motor** engineered for reliability, efficiency, and durability in demanding industrial and commercial applications. Designed with Marathon s signature precision, this **drip-proof (DP)** motor features a **TEFC (Totally Enclosed Fan-Cooled)** construction, ensuring optimal airflow while protecting internal components from dust, debris, and moisture, making it ideal for environments where cleanliness and protection are critical. The motor operates at a **synchronous speed of 1725 RPM at 60 Hz** (or 1425 RPM at 50 Hz), delivering consistent torque and smooth performance across a wide range of applications, including conveyors, pumps, compressors, and industrial machinery.

Built with **high-quality cast iron end bells and a rugged aluminum rotor**, this motor is engineered to withstand heavy-duty use while minimizing vibration and noise, ensuring prolonged operational life with minimal maintenance. The **phase induction design** provides efficient power conversion, making it energy-efficient and cost-effective for continuous operation. Its **NEMA Premium efficiency rating** further enhances performance, reducing energy consumption by up to 10% compared to standard motors, which translates to lower operational costs and a smaller environmental footprint.

The **Drip-Proof (DP) enclosure** is specifically designed to prevent water and debris from entering the motor while allowing airflow to dissipate heat, making it suitable for outdoor, semi-exposed, or mildly corrosive environments. This motor also incorporates **Marathon s advanced bearing system**, featuring sealed ball bearings that require minimal lubrication and offer extended service intervals, reducing downtime and maintenance overhead. With a **Class B insulation system** and a **temperature rise of 80 C**, it meets strict NEMA and UL safety standards, ensuring reliable performance even under fluctuating load conditions.

Whether integrated into a manufacturing line, HVAC system, or material handling equipment, the **Marathon 56T17D15631A** delivers dependable power with minimal energy loss, making it a smart investment for businesses seeking a balance of performance, durability, and efficiency. Its compact yet sturdy design allows for easy installation in tight spaces, while its **low-maintenance construction** ensures long-term reliability with reduced operational disruptions. Backed by Marathon s reputation for quality and innovation, this motor is a trusted choice for engineers and facility managers looking for a motor that performs consistently under the most demanding conditions.

**Pros and Cons of buying a Marathon 56T17D15631A (3/2 HP, Phase Induction Motor, 1725/1425 RPM, Drip-Proof)**

### **Pros**

1. **Reliability and Durability** Marathon is a well-known brand in the industrial motor market, known for producing high-quality, long-lasting motors. This model is designed for general-purpose applications, making it suitable for a wide range of uses, including conveyors, pumps, and compressors.

2. **Drip-Proof (Drip-Resistant) Design** The drip-proof enclosure (NEMA Design B) protects the motor from accidental drips of water or light debris, reducing the risk of damage from minor spills or dust. This makes it suitable for indoor or lightly exposed outdoor environments.

3. **Standardized Performance** The motor operates at **1725 RPM at 60 Hz** and **1425 RPM at 50 Hz**, which is a common speed for many industrial applications. This compatibility ensures it can be easily integrated into existing systems without requiring additional gearing.

4. **Phase Induction Motor (Single-Phase)** While not as efficient as three-phase motors, single-phase induction motors are widely available, easier to install, and more cost-effective for smaller applications where three-phase power is unavailable.

5. **Compact and Lightweight (3/2 HP)** At **3/2 horsepower (1.5 HP)**, this motor is suitable for moderate-duty tasks, making it a good fit for small to medium-sized machinery. Its size also allows for easier installation in tight spaces.

6. **Low Maintenance Requirements** Like most standard induction motors, this unit requires minimal upkeep, primarily involving routine inspections of bearings, brushes (if applicable), and cooling systems.

7. **Cost-Effective for General Use** Compared to premium or custom motors, this model offers a balance between performance and affordability, making it a practical choice for budget-conscious buyers who still need reliable power.

---

### **Cons**

1. **Single-Phase Limitations** Single-phase motors are less efficient than three-phase motors, especially at lower loads. They may struggle with heavy starting loads or require additional components (such as capacitors) for smoother operation in some applications.

2. **No Built-In Protection Against Overloads** Unlike some premium motors, this standard model lacks built-in overload protection, meaning external overload relays or thermal protection devices may be necessary to prevent damage from prolonged overloading.

3. **Limited Environmental Resistance** While drip-proof, it is not fully weatherproof (e.g., no IP rating for dust or water immersion). For harsh outdoor conditions, a more robust enclosure (e.g., NEMA 4 or 4X) would be required.

4. **Standardized Efficiency** This motor follows **NEMA Premium efficiency standards**, which are good but not as energy-efficient as **IE3 or IE4 motors** (common in newer European or high-efficiency models). Over time, this could lead to slightly higher energy costs.

5. **No Brushless Design (If Applicable)** If this motor uses brushes (common in smaller single-phase models), brush wear over time may require maintenance or replacement, adding to long-term costs.

6. **Potential Compatibility Issues** Depending on the application, the **1725/1425 RPM** speed may not match the ideal operating speed of some machinery, requiring additional gearing or pulley adjustments, which could introduce mechanical inefficiencies.

7. **Limited Customization** Unlike custom or premium motors, this model does not offer specialized features such as variable frequency drive (VFD) compatibility, built-in sensors, or custom mounting options.

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### **Conclusion**

The **Marathon 56T17D15631A (3/2 HP, single-phase, drip-proof)** is a solid, reliable choice for general-purpose industrial applications where **cost-effectiveness, ease of installation, and moderate performance** are prioritized. It excels in environments with minimal exposure to moisture or debris and where three-phase power is unavailable. However, it may fall short in **high-efficiency, heavy-duty, or extreme-environment applications**, where more advanced or specialized motors would be preferable.

For users needing **long-term energy savings, heavy-duty protection, or precise speed control**, investing in a **higher-efficiency motor (IE3/IE4), a three-phase motor, or one with built-in protection** may be justified. Conversely, for **basic, low-to-moderate load applications**, this Marathon motor provides a **practical, no-frills solution** with minimal maintenance requirements.

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### **Recommendation**

- You need a **reliable, standard single-phase motor** for general use (e.g., small conveyors, fans, pumps).

- Your application operates in a **dry or lightly exposed environment** where drip-proof protection is sufficient.

- You are working with a **budget constraint** and do not require premium efficiency or advanced features.

- Three-phase power is **not available**, and single-phase operation is acceptable.

- Your application demands **high efficiency (IE3/IE4)** or **energy savings** over time.

- The motor will operate in **harsh outdoor conditions** (consider NEMA 4 or explosion-proof enclosures).

- You require **VFD compatibility, overload protection, or brushless design** for reduced maintenance.

- The load is **heavy or requires precise speed control**, necessitating a three-phase or custom motor.

For most **basic industrial or commercial uses**, this Marathon motor is a **sound investment** that balances performance, availability, and cost. However, always verify **voltage compatibility, load requirements, and environmental conditions** before purchasing to ensure it meets your specific needs.

Details:

Marathon 3/2 HP Three Phase Induction Motor 1725/1425 RPM Open Drip-Proof.

part #: 56t17d15631a prices

• $299.99-$399.00

specifications oelemot:

• brand: Marathon
• mpn: 56t17d15631a
• part type: Hp Motor
• actual rated input voltage: 208-230/460, 190/380-415
• full load amps: 4.9-2.4/4.9-2.4
• nema design letter: Design B
• rated load: Hp
• ac frequency rating: 60/50 Hz
• enclosure type: Open Drip-proof
• base rpm: 1725/1425
• ac motor type: Induction/asynchronous
• current type: Ac
• protection against liquids: Dripping Water When Tilted
• ip rating: Ip22
• service factor: 1.15
• ac phase: Three Phase
• protection against solids: Gentle Prodding

general oelemot:

• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors
• condition: Used

shipping oelemot:

• type: Calculated
• class: Standard
• carrier: USPS
• service: USPS Ground Advantage
• transit: 6-9 Days
• cost: $54.89

seller oelemot:

• city: Renton, Washington
• rating: 0.0%
• # reviews: 0

returns oelemot:

• policy: No Returns

offer oelemot:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• best offers: True
• started: February 11, 2026
• quantity: 1

payments oelemot:

• wallet: Paypal
• credit card: Visa
• other

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