DAYTON 3N487B Motor 3/4HP 1800RPM 208-220/440V 2.8-2.7/1.35A 50/60HZ 3PH

( Brand: Dayton ), ( Manufacturer Part Number: 3N487B ), ( Part Type: Motor )

Review DAYTON Motor 3/4hp 1800rpm 208-220/440v 2.8-2.7/1.35a 50/60hz 3ph Used

The **Dayton 3N487B motor** is a robust, high-performance electric motor designed for demanding industrial, commercial, and mechanical applications where reliability and efficiency are paramount. This **3/4 horsepower (0.75 hp)** three-phase induction motor operates at a consistent **1800 RPM**, delivering a balanced blend of power and precision for a wide range of machinery, including conveyors, pumps, compressors, fans, and automated equipment. Built with **Dayton s reputation for durability**, this motor is engineered to withstand continuous operation under varying load conditions, ensuring long-term performance with minimal maintenance.

Powered by a **208-220/440-volt** electrical system, the 3N487B accommodates both **50Hz and 60Hz** frequency standards, making it versatile for global applications without modification. Its **current draw** is optimized for efficiency, with **2.8 amps at 208/220V (50Hz)** and **2.7 amps at 208/220V (60Hz)**, while at **440V**, it operates at a more economical **1.35 amps**, reducing energy consumption and operational costs. The motor s compact yet sturdy **NEMA Premium design** ensures high efficiency, low noise levels, and reduced heat generation, contributing to a quieter and more energy-efficient workspace.

Constructed with **high-grade materials**, including a **totally enclosed fan-cooled (TEFC) housing**, the 3N487B motor is protected against dust, moisture, and debris, making it ideal for environments where cleanliness and protection are critical. Its **ball-bearing construction** provides smooth, vibration-free operation, extending the motor s lifespan while maintaining consistent torque output. The **3-phase induction design** ensures reliable starting performance and stable operation under varying loads, making it a dependable choice for both new installations and replacement applications.

Whether integrated into a **HVAC system, material handling unit, or industrial automation setup**, the Dayton 3N487B motor delivers **consistent power, energy efficiency, and long-term reliability**. Its **universal voltage compatibility** and **adaptability to different frequency standards** further enhance its appeal for businesses seeking a versatile, high-performance motor that meets strict operational demands. With Dayton s commitment to quality and performance, this motor is a trusted solution for engineers and technicians looking for a dependable power source that balances strength, efficiency, and durability.

### **Pros and Cons of buying a Dayton 3N487B Motor (3/4 HP, 3-Phase, 1800 RPM)**

#### **Pros**

1. **Reliable Brand Reputation** Dayton is a well-established manufacturer known for producing durable, high-quality industrial motors. Their motors are widely used in commercial and industrial applications, offering consistent performance over time.

2. **Three-Phase Compatibility** This motor is designed for three-phase power (208-220V/440V), which is more efficient than single-phase motors for high-power applications. Three-phase motors generally provide smoother operation, better torque, and higher efficiency, making them ideal for machinery requiring steady power.

3. **Wide Voltage Range** The motor operates efficiently across a broad voltage range (208-220V for 2.8A/2.7A and 440V for 1.35A), allowing flexibility in different electrical setups without needing significant adjustments.

4. **Dual Frequency Support (50/60Hz)** The motor is compatible with both 50Hz and 60Hz power supplies, making it suitable for global use or applications where frequency switching may occur.

5. **Standard Industrial Specifications** The 3/4 HP rating (225W) is common for small to medium industrial equipment, such as pumps, fans, conveyors, or small machinery. Its 1800 RPM speed is standard for many applications, reducing the need for additional gearing.

6. **Compact and Lightweight** At 3/4 HP, this motor is relatively small and lightweight compared to larger industrial motors, making it easier to install in tight spaces or portable equipment.

7. **Low Maintenance Requirements** Dayton motors are designed for longevity with minimal upkeep. They typically feature sealed bearings and robust construction, reducing the risk of frequent failures.

8. **Cost-Effective for Small Applications** While not the cheapest motor available, its balance of performance, reliability, and price makes it a cost-effective choice for small-scale industrial or commercial use.

9. **Easy Availability of Parts** As a widely distributed brand, replacement parts, wiring diagrams, and technical support are readily available, reducing downtime in case of repairs.

10. **Energy Efficiency** Three-phase motors are inherently more energy-efficient than single-phase motors of similar power ratings, leading to lower operational costs over time.

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#### **Cons**

1. **Single-Speed Operation** This motor operates at a fixed speed (1800 RPM), which may not be suitable for applications requiring variable speed control. If adjustable speed is needed, a variable frequency drive (VFD) would be required, adding to the system cost.

2. **Three-Phase Dependency** The motor requires a three-phase power supply, which may not be available in all locations (e.g., residential areas or small workshops). This could limit its use in certain environments.

3. **Higher Initial Cost Than Single-Phase** While still affordable for its class, a three-phase motor is generally more expensive upfront than a single-phase motor of similar power. However, the long-term efficiency gains often justify the cost.

4. **Sensitivity to Voltage Fluctuations** Like all motors, this one can be affected by voltage spikes or drops, which may reduce lifespan or cause premature failure. A proper voltage regulator or surge protector may be necessary in unstable electrical environments.

5. **Limited Overload Capacity** At 3/4 HP, this motor is not designed for heavy-duty continuous overloads. Prolonged operation at maximum load could lead to overheating or reduced efficiency.

6. **Installation Complexity** Three-phase motors require careful wiring and connection to the power source, which may necessitate electrical expertise. Incorrect wiring can lead to motor damage or safety hazards.

7. **Noise and Vibration** Some three-phase motors, depending on their design, can produce noticeable noise and vibration during operation. While this motor is likely well-balanced, it may not be ideal for applications requiring absolute silence (e.g., precision machinery in cleanrooms).

8. **Not Ideal for Portable Use** Due to its three-phase requirement and size, this motor is not practical for portable or battery-powered applications. It is best suited for fixed installations with reliable power sources.

9. **Potential Compatibility Issues** If the motor is being used in an application with non-standard mounting or environmental conditions (e.g., extreme temperatures, high humidity, or corrosive environments), additional protective measures (e.g., enclosures, seals) may be required.

10. **Resale Value** Like most industrial motors, this one has little to no resale value, so purchasing should be based on immediate needs rather than future resale potential.

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### **Conclusion**

The **Dayton 3N487B 3/4 HP three-phase motor** is an excellent choice for **small to medium industrial or commercial applications** where reliability, efficiency, and three-phase power are priorities. Its dual-frequency support, wide voltage range, and robust construction make it versatile for a variety of uses, including pumps, fans, conveyors, and light machinery. The motor s reputation for durability and ease of maintenance further enhances its appeal for users who prioritize long-term performance.

However, its **fixed-speed operation, three-phase requirement, and higher upfront cost compared to single-phase alternatives** may limit its suitability for certain applications. If variable speed control is needed, additional equipment (e.g., a VFD) will be required, increasing the system cost. Additionally, users without access to three-phase power or those operating in unstable electrical environments should carefully consider whether this motor is the best fit.

For **most small industrial or commercial setups with stable three-phase power**, this motor is a **strong recommendation** due to its balance of performance, efficiency, and cost-effectiveness. If the application demands variable speed or single-phase operation, alternative motors should be evaluated.

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### **Final Recommendation**

- You have access to a **three-phase power supply** (208-220V or 440V).

- Your application requires **reliable, efficient power** (e.g., pumps, fans, conveyors, or small machinery).

- You need a **durable, low-maintenance motor** with a proven track record.

- Your setup does not require **variable speed control** (or you are willing to add a VFD later).

- You operate in a **stable electrical environment** (or can mitigate voltage fluctuations).

- You only have **single-phase power** available.

- Your application demands **variable speed control** without a VFD.

- You are working in an environment with **frequent voltage spikes or unstable power**.

- You need a **portable or battery-powered solution**.

- You require **extremely quiet operation** (though this motor is likely acceptable for most industrial uses).

For most **small-scale industrial or commercial users with three-phase power**, the Dayton 3N487B is a **solid, cost-effective choice** that delivers reliable performance for years with proper installation and maintenance.

Details:

part #: 3n487b prices

• $150.00-$432.00

specifications oelemot:

• brand: Dayton
• mpn: 3n487b
• part type: Motor

offer oelemot:

• sold: 0
• started: February 18, 2026
• options: Ship-to-home
• quantity: 1
• availability: In Stock

returns oelemot:

• time: 30 Days
• method: Money back
• paid by: Seller
• policy: Returns Accepted

shipping oelemot:

• type: Calculated
• cost: $41.88
• transit: 3-4 Days
• class: Standard, Expedited, One-day
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air
• carrier: UPS

general oelemot:

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

payments oelemot:

• other
• credit card: Mastercard
• wallet: Paypal

seller oelemot:

• # reviews: 9963
• rating: 100.0%
• city: Minneapolis, Minnesota

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