
( Brand: Marathon Electric ), ( Manufacturer Part Number: 5KH35K617D3308S ), ( Model: C215O ), ( Part Type: Ac Motor ), ( Actual Rated Input Voltage: 208-230/460 ), ( Full Load Amps: 9.2-8.6/4.3 ), ( Nema Design Letter: Design B ), ( Ac Frequency Rating: 60 Hz ), ( Enclosure Type: Dp ), ( Base Rpm: 1725 ), ( Ac Motor Type: Induction/asynchronous ), ( Mounting Type: Foot-mounted ), ( Current Type: Ac ), ( Service Factor: 1.15 ), ( Nominal Rated Input Voltage: 208 V, 230 V, 460 V ), ( Ac Phase: Three Phase )
The **Marathon Electric 5KH35K617D3308S 3HP, 3-Phase AC Motor** is a robust, high-performance electric motor engineered for demanding industrial applications where reliability, efficiency, and durability are paramount. Part of Marathon s renowned **K Series** lineup, this motor is designed to deliver consistent performance in environments where precision and longevity are critical, such as manufacturing plants, HVAC systems, conveyors, pumps, and compressors. With a **3 horsepower (HP) output**, it provides a balanced blend of power and efficiency, making it suitable for medium-duty applications where steady torque and smooth operation are essential.
This motor operates within a **dual-voltage range of 208-230V or 460V**, offering versatility for integration into various electrical systems without requiring significant modifications. Its **60Hz frequency** ensures compatibility with standard North American power grids, while the **1,725 RPM synchronous speed** provides an optimal balance between speed and torque for a wide range of mechanical loads. The **DP (Drip-Proof) C215O enclosure** is a standout feature, offering **IP55 protection** against dust, dirt, and water splashes, making it ideal for both indoor and outdoor installations where exposure to harsh conditions is a concern. The **C215O designation** further enhances its robustness by incorporating a **vented design with a guard**, preventing the ingress of solid objects while allowing adequate airflow for thermal management.
Under the hood, this motor is built with **Marathon s high-quality materials and precision engineering**, including a **cast iron endbell construction** for durability and a **ball-bearing support system** that ensures smooth, vibration-free operation over extended periods. The **3-phase AC induction design** guarantees efficient power conversion, minimizing energy waste while maximizing mechanical output. Additionally, the motor s **NEMA Premium efficiency rating** a hallmark of Marathon s commitment to energy conservation reduces operational costs by improving power factor and lowering electricity consumption compared to standard motors.
For ease of installation and maintenance, the **5KH35K617D3308S** features a **standard NEMA 42 frame**, compatible with a wide range of industry-standard couplings, belts, and mounts. Its **S suffix designation** indicates a **single-speed, standard duty** configuration, making it a straightforward choice for applications where no variable speed requirements exist. The motor s **thermal protection** is built into the design, with internal overload relays that help prevent damage from overheating, thereby extending the motor s lifespan and reducing downtime.
Whether deployed in a **food processing facility, industrial automation system, or commercial HVAC setup**, this Marathon motor delivers **reliable, high-performance operation** with minimal maintenance demands. Its **quiet operation, low vibration levels, and long-term durability** make it a cost-effective solution for businesses seeking a motor that balances performance with operational efficiency. With Marathon s reputation for **superior quality and dependability**, the **5KH35K617D3308S** is not just a power source it s a dependable workhorse built to meet the challenges of modern industrial environments.
### **Pros and Cons of buying a Marathon Electric 5KH35K617D3308S (3HP, 3-Phase AC Motor, 208-230/460V, 1725 RPM, 60Hz, DP C215O)**
#### **Pros:**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 motor s dual-voltage capability (208-230V and 460V) makes it versatile for different electrical systems, reducing the need for additional voltage conversion equipment.
3. **Standard NEMA Design (DP C215O)** The DP (Drip-Proof) enclosure with C215O (open drip-proof) protection is suitable for indoor or outdoor use in environments with moderate exposure to dust, water splashes, and light corrosion. This makes it a practical choice for many industrial settings.
4. **Efficient Performance (3HP, 1725 RPM)** At 3 horsepower, this motor is suitable for medium-duty applications such as pumps, compressors, conveyors, and small machinery. The 1725 RPM speed is standard for many industrial applications, ensuring compatibility with existing systems.
5. **60Hz Compatibility** The motor is designed for 60Hz operation, which aligns with the standard electrical grid frequency in North America, making it easy to integrate into existing infrastructure.
6. **Cost-Effective for Small to Medium Applications** Compared to larger industrial motors, this 3HP model is relatively affordable while still providing robust performance. It is a cost-effective solution for businesses needing a dependable motor without the expense of a high-end premium brand.
7. **Easy Maintenance and Availability of Parts** Marathon Electric motors are widely available through distributors, and replacement parts are commonly stocked. Their design simplifies maintenance, making repairs and servicing more straightforward.
8. **Energy Efficiency** While not a premium energy-efficient motor (like IE3 or IE4), it still operates efficiently for its class, helping reduce operational costs compared to older, less efficient models.
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#### **Cons:**1. **Not Premium Energy-Efficient** This motor does not meet the latest energy efficiency standards (such as IE3 or IE4). If energy savings are a priority, a more advanced motor may offer better long-term cost reductions.
2. **Limited Warranty (Standard Industry Terms)** Like most industrial motors, Marathon Electric typically offers a limited warranty (often 1-2 years), which may not cover all potential failure points, especially in harsh operating conditions.
3. **Higher Initial Cost Than Single-Phase Motors** For applications where a single-phase motor would suffice, this 3-phase motor may be overkill and more expensive upfront. However, 3-phase motors generally offer better performance and efficiency for continuous-duty applications.
4. **Requires 3-Phase Power Supply** Unlike single-phase motors, this motor necessitates a 3-phase electrical setup, which may not be available in all locations. This could add infrastructure costs if the facility lacks 3-phase power.
5. **Sensitivity to Voltage Fluctuations** While it operates on a wide voltage range, significant voltage fluctuations (either too high or too low) can reduce efficiency, increase wear, or even damage the motor over time. Proper voltage regulation is essential for longevity.
6. **No Built-In Protection Against Overloads or Short Circuits** The motor lacks integrated overload protection, meaning additional safeguards (such as thermal overload relays) must be installed to prevent damage from excessive current or faults.
7. **Limited Customization Options** This is a standard off-the-shelf motor with fixed specifications. If specialized features (e.g., VFD compatibility, custom enclosures, or specific mounting options) are required, additional modifications may be needed, increasing costs.
8. **Potential for Higher Noise and Vibration** Like many industrial motors, it may produce noticeable noise and vibration during operation, which could be a concern in noise-sensitive environments.
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### **Conclusion:**The **Marathon Electric 5KH35K617D3308S** is a **solid, reliable choice** for businesses needing a **durable, medium-duty 3-phase AC motor** for applications such as pumps, compressors, conveyors, or small industrial machinery. Its **dual-voltage capability, standard NEMA enclosure, and proven brand reputation** make it a practical and cost-effective option for many commercial and light industrial uses.
However, it is **not the best choice** if:- **Energy efficiency is a top priority** (consider an IE3 or IE4 motor).
- **Single-phase power is available and sufficient** (a single-phase motor may be cheaper and simpler).
- **The application requires extreme environmental protection** (e.g., fully sealed or explosion-proof enclosures).
- **Budget allows for a premium motor with built-in protections** (e.g., overload relays, VFD compatibility).
For **most small to medium industrial applications where reliability and versatility are key**, this motor is a **good investment**. However, buyers should ensure their electrical setup supports 3-phase power and consider additional protective measures (such as overload relays) for optimal performance and longevity.
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### **Recommendation:** **Buy this motor if:**You need a **reliable, 3HP, 3-phase motor** for standard industrial applications.
Your facility has **3-phase power (208-230V or 460V)**.
You prioritize **durability and brand trust** over cutting-edge efficiency.
You can **supplement it with proper overload protection** for safety.
**Consider alternatives if:**You require **higher energy efficiency** (look for IE3/IE4 motors).
Your application is **single-phase only** (opt for a single-phase motor).
You need **specialized features** (e.g., VFD compatibility, explosion-proof rating).
You want **longer warranty or premium support** (check brands like **WEG, ABB, or Siemens**).
For **most standard industrial uses**, this Marathon Electric motor is a **wise and cost-effective purchase**. Always verify compatibility with your specific system before ordering.
Marathon Electric 3HP 3PH AC Motor 208-230/460V 1725RPM 60Hz DP C215O.