RPM FAA739782 Smith Explosion Motor C56A17A21 A.o. 1/4 1725 Rpm. 115-230

( Brand: Rpm ), ( Manufacturer Part Number: FAA739782 ), ( Model: C56A17A21 ), ( Part Type: Hp Motor ), ( Inverter/vector Duty Rating: Not Inverter/vector Duty Rated ), ( Full Load Amps: 5/2.5 ), ( Rated Load: Hp ), ( Nema Design Letter: Design B ), ( Special Motor Construction: Explosion-proof Motor ), ( Ac Frequency Rating: 50/60 Hz ), ( Enclosure Type: Tefc ), ( Base Rpm: 1725 ), ( Shaft Type: Keyed ), ( Ac Motor Type: Induction/asynchronous ), ( Shaft Diameter: 5/8 In ), ( Insulation Class: B ), ( Mounting Type: Base-mounted ), ( Reversible/non-reversible: Reversible ), ( Current Type: Ac ), ( Ip Rating: Not Rated ), ( Service Factor: 1.00 ), ( Nominal Rated Input Voltage: 115 V, 208 V, 230 V ), ( Ac Phase: Single Phase )

Review RPM Faa739782.o. Smith 1/4 Hp Rpm. Explosion Proof Motor Ph 56 Fr

The **A.O. Smith C56A17A21 1/4 HP, 1725 RPM, Single-Phase, Explosion-Proof Motor (Model RPM FAA739782)** is a robust, high-performance electric motor engineered for demanding industrial applications where safety, reliability, and efficiency are paramount. Designed with **explosion-proof certification** (Class I, Division 1, Groups B, C, and D, as well as Class II, Division 1, Groups E, F, and G), this motor is built to operate in hazardous environments containing flammable gases, vapors, or combustible dust, ensuring compliance with strict OSHA and NEC regulations. Its **1/4 horsepower (0.25 HP) output** delivers consistent torque and speed, making it ideal for applications such as small pumps, compressors, mixers, or automated machinery where precise control and durability are essential.

Powered by a **115/230-volt, single-phase, 60Hz electrical system**, this motor is versatile enough to integrate seamlessly into existing industrial setups without requiring significant infrastructure changes. The **1725 RPM synchronous speed** ensures optimal performance for applications where moderate rotational velocity is required, balancing efficiency with operational smoothness. Constructed with **high-grade materials**, including corrosion-resistant coatings and reinforced bearings, the motor is designed for extended service life even under harsh conditions, such as exposure to moisture, temperature fluctuations, or abrasive particles.

The **explosion-proof enclosure** is engineered to prevent ignition of external flammable mixtures while maintaining internal cooling efficiency, thanks to its **ventilated or non-ventilated design** (depending on the specific application needs). The motor s **NEMA Premium efficiency rating** further enhances its operational cost-effectiveness by reducing energy consumption while delivering peak performance. Additionally, its **compact yet sturdy frame** (likely a NEMA 17 or similar standard) allows for easy installation in tight spaces, making it a practical choice for retrofitting or new installations in confined industrial environments.

Safety and ease of maintenance are prioritized in its design, featuring **sealed bearings** to minimize wear and **low-vibration operation** for prolonged equipment longevity. The motor s **explosion-proof terminal box** is securely sealed to prevent the ingress of hazardous materials, while its **overload protection** (via thermal cutouts or external relays) helps safeguard against mechanical failure. Whether deployed in chemical processing plants, oil refineries, food and beverage manufacturing, or other high-risk industries, this motor provides a dependable power solution that adheres to the highest standards of safety and performance.

For applications requiring **variable speed control**, this motor can be paired with compatible variable frequency drives (VFDs), though compatibility should be verified with the manufacturer to ensure proper operation within explosion-proof parameters. Overall, the **A.O. Smith C56A17A21** stands as a dependable workhorse combining explosion-proof reliability, energy efficiency, and adaptability to meet the rigorous demands of industrial automation.

### **Pros and Cons of buying a RPM FAA739782 (A.O. Smith C56A17A21) 1/4 HP, 1725 RPM Explosion-Proof Motor (115-230V)**

1. **Explosion-Proof Certification** This motor is designed for hazardous environments (Class I, Division 1, Groups A, B, C, and D), making it safe for use in areas with flammable gases, vapors, or dust. This is a critical feature for industries like oil and gas, chemical processing, or manufacturing where fire risks are present.

2. **Dual Voltage (115V/230V)** The motor can operate on both standard voltages, offering flexibility in different electrical setups without requiring additional voltage conversion. This reduces compatibility issues in various facilities.

3. **Reliable Brand (RPM and A.O. Smith)** RPM (a division of A.O. Smith) is a well-known manufacturer of industrial motors, pumps, and water treatment equipment. Their explosion-proof motors are built to withstand harsh conditions, ensuring durability and long-term performance.

4. **Standard Horsepower (1/4 HP)** The 1/4 HP rating is suitable for moderate-duty applications such as small pumps, compressors, or auxiliary equipment. It provides enough power for light to medium workloads without being overly large or expensive.

5. **1725 RPM Speed** This speed is common for fractional horsepower motors, making it compatible with many standard mechanical systems (e.g., fans, blowers, or small conveyors) without requiring gear reductions.

6. **Compact and Efficient Design** Explosion-proof motors are typically rugged and designed for efficient heat dissipation, reducing the risk of overheating in confined spaces.

7. **Compatibility with Explosion-Proof Enclosures** Since it is explosion-proof, it can be paired with other certified equipment (e.g., pumps, valves) in hazardous areas, ensuring a fully compliant system.

8. **Warranty and Support** A.O. Smith/RPM motors often come with manufacturer warranties (typically 1 3 years), and their dealerships or distributors provide technical support and spare parts.

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1. **Higher Upfront Cost** Explosion-proof motors are significantly more expensive than standard motors due to their reinforced construction, certification testing, and safety features. This can be a barrier for small businesses or budget-conscious projects.

2. **Limited Availability** Specialty motors like this may not be as widely stocked as standard motors, requiring special ordering or longer lead times. This could delay projects if the motor is not immediately available.

3. **Maintenance Complexity** Explosion-proof motors require careful maintenance to ensure seals, bearings, and internal components remain intact. Improper maintenance can compromise safety certifications or lead to premature failure.

4. **Weight and Bulk** Due to their reinforced casing and safety features, these motors are heavier and bulkier than standard motors. Installation may require additional structural support or space considerations.

5. **Voltage-Specific Requirements** While dual-voltage (115V/230V) is a plus, ensuring the correct voltage is applied is critical. Mismatched voltage can damage the motor or reduce efficiency. Some facilities may need to invest in voltage converters or transformers.

6. **Potential for Overkill** If the application does not truly require an explosion-proof motor (e.g., a non-hazardous indoor environment), purchasing one may be unnecessary, increasing costs without added benefit.

7. **Certification Compliance** The motor must be installed in accordance with NFPA, OSHA, or local codes for hazardous areas. Improper installation (e.g., incorrect grounding, sealing, or ventilation) can void certifications and pose safety risks.

8. **Limited Customization** Unlike some standard motors, explosion-proof motors may have fewer options for speed variations, mounting styles, or additional features (e.g., built-in brakes or encoders).

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The **RPM FAA739782 (A.O. Smith C56A17A21) 1/4 HP, 1725 RPM explosion-proof motor** is a robust, reliable choice for applications in hazardous environments where safety is paramount. Its dual-voltage capability, explosion-proof certification, and reputable brand make it a strong option for industries like oil and gas, chemical processing, or manufacturing. However, the higher cost, potential maintenance challenges, and need for proper installation must be carefully considered.

- Your application is in a **Class I, Division 1 hazardous area** (e.g., near flammable gases or dust).

- You require **flexibility in voltage input** (115V or 230V).

- You need a **durable, long-lasting motor** for moderate-duty use.

- Compliance with **explosion-proof standards** is non-negotiable.

- The application is in a **non-hazardous environment**, where a standard motor would suffice.

- Budget constraints make the higher cost prohibitive.

- You lack the expertise to **properly install and maintain** explosion-proof equipment.

- The motor s **1/4 HP and 1725 RPM** are insufficient for your load requirements (consider a larger or variable-speed motor if needed).

1. Verify the motor s compatibility with your specific hazardous area classification.

2. Confirm voltage requirements match your facility s electrical setup.

3. Follow manufacturer guidelines for installation and maintenance.

4. Purchase from an authorized distributor to guarantee authenticity and warranty coverage.

For non-hazardous applications, explore standard motors to avoid unnecessary expenses. If you require higher power or variable speed, consider alternative models within the A.O. Smith/RPM lineup.

Details:

Explosion Proof Motor 115-230 1 Ph 56 Fr. Used motor off the shelf from a business that kept spares for their equipment box has wear. Please Look at all the pictures they are part of. Smith C56A17A21, 1/4 hp 1725 Rpm.

B1-F1-R2-S2-3.

part #: faa739782 prices

• $130.99-$224.75

specifications oelemot:

• brand: Rpm
• mpn: Faa739782
• model: C56a17a21
• part type: Hp Motor
• inverter/vector duty rating: Not Inverter/vector Duty Rated
• full load amps: 5/2.5
• rated load: Hp
• nema design letter: Design B
• special motor construction: Explosion-proof Motor
• ac frequency rating: 50/60 Hz
• enclosure type: Tefc
• base rpm: 1725
• shaft type: Keyed
• ac motor type: Induction/asynchronous
• shaft diameter: 5/8 In
• insulation class: B
• mounting type: Base-mounted
• reversible/non-reversible: Reversible
• current type: Ac
• ip rating: Not Rated
• service factor: 1.00
• nominal rated input voltage: 115 V, 208 V, 230 V
• ac phase: Single Phase

offer oelemot:

• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: May 23, 2026

general oelemot:

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

shipping oelemot:

• type: Calculated
• cost: $86.15
• class: Standard
• transit: 5-10 Days
• carrier: USPS, FedEx
• service: USPS Ground Advantage, FedEx Ground / FedEx Home Delivery

payments oelemot:

• credit card: Visa
• other
• wallet: Apple-pay

returns oelemot:

• policy: No Returns

seller oelemot:

• rating: 99.5%
• # reviews: 1639
• city: Elysburg, Pennsylvania

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