RELIANCE P56X3900T-RX Sxt Ac Motor Rpm 1/2HP 1725 230/460V 3PH 56C

( Brand: Reliance ), ( Manufacturer Part Number: P56X3900T-RX ), ( Part Type: Ac Motor ), ( Seer Rating: Cont )

Review RELIANCE Sxt Ac Motor 1/2hp Rpm 230/460v 3ph 56c

The **Reliance P56X3900T-RX SXT AC Motor** is a high-performance, robust electric motor engineered for demanding industrial applications where reliability, efficiency, and durability are paramount. This **1/2 horsepower (0.373 kW) three-phase induction motor** operates at a nominal speed of **1725 RPM**, making it ideal for a wide range of machinery, including conveyors, pumps, compressors, fans, and other light to medium-duty equipment. Built with precision engineering, this motor features a **56-frame size**, which balances compactness with sufficient torque output, ensuring optimal performance in both standard and specialized industrial setups.

The **SXT (Superior X-Treme) series** designation underscores its premium construction, incorporating high-quality materials and advanced manufacturing techniques to deliver superior efficiency and longevity. The motor is designed for **dual-voltage operation at 230V or 460V**, providing flexibility for integration into various electrical systems without the need for additional voltage conversion equipment. This adaptability makes it a versatile choice for facilities with differing power infrastructure requirements, whether in manufacturing plants, commercial buildings, or agricultural operations.

One of the standout features of this motor is its **RX (Reliance X-Treme) design**, which emphasizes enhanced thermal management and reduced maintenance needs. The robust **drip-proof (IP55) enclosure** protects against dust, dirt, and moisture, ensuring reliable operation in harsh or unprotected environments. The motor s **ball-bearing construction** provides smooth, low-vibration performance, minimizing wear and tear on connected equipment while extending the motor s operational lifespan. Additionally, the **high-efficiency winding** and optimized magnetic design contribute to reduced energy consumption, lowering operational costs and environmental impact.

The **P56X3900T-RX** is equipped with a **standard NEMA B flange**, ensuring compatibility with a broad range of industry-standard couplings, belts, and gearboxes. Its **direct-on-line (DOL) starting capability** simplifies installation and reduces the complexity of control systems, making it a cost-effective solution for applications where frequent starts and stops are required. For environments where additional protection is necessary, the motor can be paired with optional accessories such as thermal overload protectors, explosion-proof enclosures, or variable frequency drive (VFD) compatibility, further expanding its versatility.

Whether deployed in a **food processing facility, HVAC system, or material handling operation**, this motor delivers consistent performance under varying loads. Its **low-noise operation** and **minimal maintenance requirements** contribute to a quieter, more efficient workspace, while its **long-term reliability** ensures minimal downtime and reduced replacement costs. With a focus on **durability, energy efficiency, and adaptability**, the Reliance P56X3900T-RX SXT AC Motor stands as a dependable workhorse for industries seeking a balance of power, precision, and cost-effectiveness.

### **Pros and Cons of buying a Reliance P56X3900T-RX SXT AC Motor (1/2 HP, 1725 RPM, 230/460V, 3-Phase, 56C)**

1. **Reliability and Brand Reputation** Reliance Electric is a well-known manufacturer of industrial motors with a strong track record in durability and performance. Their motors are often preferred in industrial and commercial applications due to their consistent quality.

2. **Dual Voltage (230V/460V)** The motor s ability to operate on both 230V and 460V makes it versatile for different electrical setups without requiring additional voltage conversion, which can be cost-effective for facilities with varying power requirements.

3. **Three-Phase Design** Three-phase motors are generally more efficient, smoother in operation, and better suited for heavy-duty applications compared to single-phase motors. This makes them ideal for industrial machinery, pumps, compressors, and conveyors.

4. **High Efficiency (56C Insulation Class)** The 56C insulation class indicates that the motor is designed for higher operating temperatures, which extends its lifespan and reduces the risk of overheating in demanding environments.

5. **Compact and Lightweight (1/2 HP)** At half horsepower, this motor is suitable for smaller applications where space and weight are concerns, such as in HVAC systems, small pumps, or light machinery.

6. **SXT Series Features** The "SXT" designation suggests enhanced performance, possibly including features like improved cooling, better bearing quality, or optimized winding for efficiency. This can translate to lower energy consumption and longer service life.

7. **Easy Maintenance** Reliance motors are known for their straightforward maintenance requirements, with accessible components and clear service manuals, which can reduce downtime.

8. **Compatibility with Variable Frequency Drives (VFDs)** Many Reliance motors are designed to work seamlessly with VFDs, allowing for speed control and energy savings in applications where variable speeds are beneficial.

9. **Global Availability and Support** Reliance has a widespread distribution network, making it easier to source spare parts, replacements, or technical support if needed.

10. **Cost-Effective for Small Applications** For its power rating, this motor offers a balance between affordability and performance, making it a practical choice for budget-conscious buyers who still need reliable performance.

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1. **Limited Power for Heavy-Duty Applications** At only 1/2 HP, this motor may struggle with continuous heavy loads or applications requiring higher torque, such as large pumps, mixers, or high-capacity conveyors. Oversizing or frequent overloads could reduce its lifespan.

2. **Three-Phase Dependency** Three-phase power is not universally available, especially in smaller commercial or residential settings. If your facility lacks three-phase wiring, you may need to invest in additional infrastructure, which can be costly.

3. **Potential for Higher Initial Cost Compared to Single-Phase** While not excessively expensive, three-phase motors can be more costly upfront than single-phase alternatives, particularly for small applications where single-phase might suffice.

4. **Specialized Installation Requirements** Three-phase motors require careful wiring and balancing of phases. Incorrect installation can lead to inefficiencies, overheating, or motor failure. Professional installation may be necessary, adding to the overall cost.

5. **Limited Customization Options** This is a standard motor, and customization (e.g., specific mounting configurations, enclosures, or additional protections) may require additional ordering or modifications, which could delay delivery.

6. **Energy Consumption** While efficient for its class, a 1/2 HP motor will still consume a noticeable amount of power. In applications where energy costs are a major concern, the operational expenses should be factored into the decision.

7. **Noise and Vibration** Like most electric motors, this one may produce some noise and vibration during operation. While generally minimal for a 1/2 HP motor, it could be a consideration in noise-sensitive environments.

8. **Dependence on Power Quality** Motors are sensitive to voltage fluctuations, harmonics, or poor power quality. If your facility has inconsistent power supply, the motor s performance or lifespan could be affected.

9. **Warranty and Support Limitations** While Reliance offers good warranties, the terms may vary by region or distributor. Some buyers report that after-sales support can be inconsistent, especially for older models or less common variants.

10. **Potential for Obsolescence** As technology advances, newer motors may offer even better efficiency, smart features (e.g., IoT integration, predictive maintenance), or environmental benefits. This motor lacks such modern enhancements.

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The **Reliance P56X3900T-RX SXT AC Motor (1/2 HP, 3-Phase, 230/460V)** is a solid choice for **small to medium industrial, commercial, or light-duty applications** where reliability, dual-voltage compatibility, and three-phase efficiency are priorities. It excels in environments where space is limited, and the motor s compact size is advantageous. The 56C insulation class and SXT series features further enhance its durability and efficiency, making it a practical option for pumps, fans, conveyors, or HVAC systems.

However, it is **not ideal for high-torque or heavy-duty applications**, and its three-phase requirement may limit its use in settings without the necessary infrastructure. Buyers should carefully assess their power needs, available electrical setup, and long-term maintenance considerations before purchasing.

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- You need a **reliable, efficient 1/2 HP three-phase motor** for applications like small pumps, fans, conveyors, or light machinery.

- Your facility has **three-phase power** (230V or 460V) and can accommodate the motor s requirements.

- You prioritize **brand reputation, dual-voltage flexibility, and ease of maintenance**.

- The motor fits within your **budget and power needs** without being oversized or undersized for the task.

- Your application requires **higher horsepower or torque** (e.g., 1 HP or above). In this case, a larger motor (e.g., 1 HP or 3/4 HP) or a motor with higher starting torque may be necessary.

- You lack **three-phase power** and cannot justify the cost of upgrading your electrical system.

- You need **smart features, energy monitoring, or IoT integration**, as this motor lacks such capabilities.

- The motor will operate in **extremely harsh environments** (e.g., high dust, corrosive chemicals, or extreme temperatures), where a more rugged or explosion-proof motor may be required.

**Final Verdict:** This motor is a **good value for its intended use** and is particularly well-suited for industrial or commercial settings where reliability and efficiency are key. For most small to medium applications, it offers a strong balance of performance and cost-effectiveness. However, always verify compatibility with your specific load requirements and electrical setup before purchasing.

Details:

In good used condition. Part NumberP56X3900T-RX / FB56C. Model P56X3900T-RX. voltage : 230/460.

Country of Manufacture/A. Ask our experts. And the cost of return shipping. Rating: Cont.

Items in Lot1. Condition Used.

part #: p56x3900t prices

• $205.20-$350.00

specifications oelemot:

• brand: Reliance
• mpn: P56x3900t-rx
• part type: Ac Motor
• seer rating: Cont

payments oelemot:

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

offer oelemot:

• options: Ship-to-home
• best offers: True
• quantity: 1
• started: February 27, 2026
• sold: 0
• availability: In Stock

returns oelemot:

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

shipping oelemot:

• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight
• cost: $75.28
• class: Standard, Expedited, One-day
• type: Calculated
• transit: 3-5 Days
• carrier: FedEx

general oelemot:

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

seller oelemot:

• # reviews: 17863
• rating: 99.9%
• city: Millersburg, Indiana

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