MARATHON 56T17D6542A Ac Motor Dp 1.5HP 3PH 208-230/460V 1725RPM 60HZ SF1.15

( Brand: Marathon ), ( Manufacturer Part Number: 56T17D6542A ), ( Part Type: Ac 5hp Motor ), ( Actual Rated Input Voltage: 208-230/460 ), ( Full Load Amps: 5.2/2.6 ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Enclosure Type: Open ), ( Base Rpm: 1725 ), ( Shaft Type: Keyed ), ( Ac Motor Type: Induction/asynchronous ), ( Mounting Type: Base-mounted ), ( Reversible/non-reversible: Reversible ), ( Current Type: Ac ), ( Service Factor: 1.15 ), ( Nominal Rated Input Voltage: 208 V, 230 V, 460 V ), ( Ac Phase: Three Phase )

Review MARATHON 1.5hp 3ph Ac Motor 208-230/460v 1725rpm 60hz Dp

The **Marathon 56T17D6542A** is a robust, high-performance **1.5 horsepower, three-phase AC induction motor** designed for demanding industrial and commercial applications where reliability, efficiency, and durability are paramount. Engineered with Marathon s signature precision and engineering excellence, this motor delivers consistent performance across a wide range of operational environments, making it an ideal choice for conveyor systems, pumps, compressors, fans, and other heavy-duty machinery. Built to NEMA Premium efficiency standards, the 56T17D6542A ensures superior energy savings while maintaining a robust torque output, reducing operational costs and minimizing environmental impact over its extended service life.

This motor operates seamlessly within a **dual-voltage range of 208-230 volts or 460 volts**, providing versatility for integration into various electrical systems without requiring significant modifications. Its **60Hz design** ensures compatibility with standard North American power grids, while the **1,725 RPM synchronous speed** (with a full-load slip of approximately 1.15%) optimizes mechanical efficiency, reducing wear on connected equipment and enhancing overall system performance. The **DP (Drip-Proof) enclosure** with a **Service Factor (SF) of 1.15** further reinforces its suitability for applications where protection against dust, debris, and light splashes is essential, while the elevated service factor allows for temporary overloads without compromising longevity.

Constructed with high-grade materials, the 56T17D6542A features a **cast aluminum rotor and stator**, ensuring superior thermal conductivity and resistance to heat buildup, even under prolonged heavy loads. The motor s **ball-bearing support system** provides smooth, low-friction operation, reducing maintenance requirements and extending bearing life. Additionally, its **NEMA Premium certification** guarantees adherence to strict energy efficiency guidelines, delivering up to **95% efficiency** a testament to Marathon s commitment to sustainability and operational cost reduction. Whether deployed in manufacturing plants, HVAC systems, or material handling applications, this motor exemplifies a perfect blend of power, efficiency, and reliability, ensuring dependable performance for years to come.

### **Pros and Cons of buying a Marathon 56T17D6542A 1.5HP 3-Phase AC Motor (208-230/460V, 1725 RPM, 60Hz, DP, SF1.15)**

1. **Reliable Brand Reputation** Marathon Electric is a well-established manufacturer known for durable, high-quality industrial motors. Their products are widely used in commercial and industrial applications, offering long-term reliability.

2. **Wide Voltage Range (208-230/460V)** The dual-voltage capability (208-230V and 460V) makes this motor versatile for different electrical setups without requiring a separate model. This flexibility is useful in facilities with varying power configurations.

3. **Standard NEMA Premium Efficiency (SF1.15)** The motor meets NEMA Premium efficiency standards, meaning it consumes less energy compared to standard motors while maintaining performance. This can lead to lower operational costs over time.

4. **Direct Online (DOL) Start Capability** The motor is designed for direct online starting, which simplifies installation and reduces the need for additional control components like soft starters or variable frequency drives (VFDs) in basic applications.

5. **Compact and Standard Frame Size (56 Frame)** The 56 frame is a common industrial size, making it easy to find replacement parts, accessories, and compatible components. It is also suitable for a wide range of applications, from conveyors to pumps and fans.

6. **Rated for 60Hz Operation** The 1725 RPM speed at 60Hz is standard for many industrial applications, ensuring compatibility with existing equipment and belts/pulleys designed for this speed.

7. **Low Maintenance Design** As a standard NEMA motor, it is built with sealed bearings and robust construction, reducing the likelihood of frequent maintenance issues. However, like all motors, it will require periodic lubrication and inspection.

8. **Cost-Effective for Basic Applications** For applications where a VFD or specialized motor is not required, this motor offers a balance of performance and affordability. It is often cheaper than premium or high-efficiency models with additional features.

9. **Compatibility with Standard Controls** The motor works seamlessly with typical industrial control systems, including starters, relays, and PLCs, without requiring specialized interfaces.

- Conveyor systems

- Pumps and blowers

- Industrial fans

- Compressors

- Agitators and mixers

---

1. **No Variable Frequency Drive (VFD) Compatibility** This is a standard DOL motor and is not designed for VFD operation. If your application requires speed control or soft starting, you would need to add a VFD, which adds complexity and cost.

2. **Limited Speed Control Options** Without a VFD, the motor runs at a fixed speed (1725 RPM at 60Hz). Applications requiring variable speeds (e.g., HVAC systems, precise process control) would need additional equipment.

3. **Higher Inrush Current** Direct online starting can cause a significant surge in current (typically 5-7 times the running current), which may require larger circuit breakers or additional protection in the electrical panel. This can lead to higher upfront electrical costs.

4. **Potential for Mechanical Stress** If the motor is frequently started/stopped or subjected to heavy loads, the inrush current and mechanical stress can reduce the motor s lifespan over time. A VFD or soft starter could mitigate this.

5. **Not Ideal for High-Speed or High-Torque Applications** At 1.5HP and 1725 RPM, this motor is not suitable for applications requiring high torque at low speeds (e.g., some types of conveyors or heavy-duty machinery). For such cases, a higher horsepower motor or a gearbox may be needed.

6. **Limited Environmental Protection** The motor is likely NEMA Design B (standard industrial protection), which means it is not splash-proof or dust-proof. If your application involves harsh environments (e.g., outdoor, wet, or dirty conditions), you may need a NEMA Design C, D, or IP-rated motor.

7. **No Built-in Encoder or Feedback Device** For applications requiring precise position or speed feedback (e.g., robotics, CNC machines), this motor lacks built-in sensors, requiring additional sensors or external feedback systems.

8. **Potential for Energy Inefficiency in Some Cases** While it meets NEMA Premium efficiency standards, some newer or specialized motors (e.g., IE3 or IE4 efficiency motors) may offer better energy savings in long-running applications. However, the difference may not be significant for light-duty or intermittent use.

9. **Dependence on Proper Installation and Maintenance** Like all motors, improper installation (e.g., misalignment, incorrect belt tension, or poor grounding) can lead to premature failure. Regular maintenance (e.g., bearing lubrication, cooling checks) is essential to ensure longevity.

10. **Limited Customization** This is a standard off-the-shelf motor with fixed specifications. If your application requires non-standard features (e.g., explosion-proof, hermetically sealed, or specific mounting options), you may need to source a different model.

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The **Marathon 56T17D6542A 1.5HP 3-Phase AC Motor** is a **solid, cost-effective choice for general-purpose industrial applications** where simplicity, reliability, and standard performance are prioritized. It excels in scenarios where:

- Direct online starting is acceptable.

- Fixed-speed operation is sufficient.

- Energy efficiency is important but not critical.

- The motor fits within a standard 208-460V electrical system.

- Maintenance is manageable and routine.

- Variable speed control (VFD compatibility).

- High torque at low speeds.

- Harsh or corrosive environments.

- Precise speed or position feedback.

- Frequent start/stop cycles without additional protection.

---

- You need a **reliable, low-maintenance, and energy-efficient** motor for basic industrial tasks (e.g., conveyors, pumps, fans).

- Your application does **not** require speed variation or soft starting.

- You are working within a **standard 208-460V system** and do not need specialized environmental protection.

- Budget is a consideration, and you prioritize **cost-effectiveness over advanced features**.

- You require **speed control** Add a **VFD-compatible motor** (e.g., Marathon s VFD-rated models) or pair this motor with a VFD.

- Your application involves **frequent starts/stops or high torque** Opt for a **higher horsepower motor** or a **soft-start-capable model**.

- The environment is **harsh (dusty, wet, or corrosive)** Choose a **NEMA Design C/D or IP-rated motor**.

- You need **precise speed/position control** Select a motor with **built-in encoders** or integrate external sensors.

- You want **maximum energy savings** Consider a **higher efficiency motor** (e.g., IE3 or IE4 rated).

For most **standard industrial uses**, this motor is a **good investment** due to its balance of performance, reliability, and affordability. However, always verify the **specific requirements of your application** before purchasing to ensure it meets your needs.

Details:

Marathon 1.5HP 3PH AC Motor 208-230/460V 1725RPM 60Hz DP SF1.15 56T17D6542A.

part #: 56t17d6542a prices

• $125.00-$175.00

specifications oelemot:

• brand: Marathon
• mpn: 56t17d6542a
• part type: Ac 5hp Motor
• actual rated input voltage: 208-230/460
• full load amps: 5.2/2.6
• rated load: Hp
• ac frequency rating: 60 Hz
• enclosure type: Open
• base rpm: 1725
• shaft type: Keyed
• ac motor type: Induction/asynchronous
• mounting type: Base-mounted
• reversible/non-reversible: Reversible
• current type: Ac
• service factor: 1.15
• nominal rated input voltage: 208 V, 230 V, 460 V
• ac phase: Three Phase

payments oelemot:

• other
• credit card: Diners-club
• wallet: Apple-pay

returns oelemot:

• policy: No Returns

offer oelemot:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• started: May 25, 2026
• best offers: True

shipping oelemot:

• type: Calculated
• transit: 4-10 Days
• carrier: UPS
• class: Standard
• cost: $56.68
• service: UPS Ground

general oelemot:

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

seller oelemot:

• rating: 0.0%
• city: Shoreham, New York
• # reviews: 0

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