A.O. SMITH 7-349221-01 Century Motor Rpm Dp 1.5 3-PHASE 200-460V 1745

( Brand: A.o. Smith ), ( Manufacturer Part Number: 7-349221-01 ), ( Part Type: Hp Motor ), ( Actual Rated Input Voltage: 200 V, 230 V, 460 V ), ( Full Load Amps: 4.6, 4.2/2.1 ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Enclosure Type: Dp ), ( Base Rpm: 1745 ), ( Ac Motor Type: Induction/asynchronous ), ( Mounting Type: Base-mounted ), ( Reversible/non-reversible: Reversible ), ( Current Type: Ac ), ( Service Factor: 1.15 ), ( Ac Phase: Three Phase )

Review A.O. SMITH .o. 7-349221-01.o. Century E plus 1.5 Hp 3-phase Motor Rpm Dp

The **A.O. Smith Century E-Plus 1.5 HP 3-Phase Motor (Model #7-349221-01)** is a robust, high-performance electric motor engineered for demanding applications where reliability, efficiency, and durability are paramount. Designed with A.O. Smith s signature engineering precision, this **1.5 horsepower, 3-phase induction motor** operates seamlessly across a broad voltage range of **200-460 volts**, making it exceptionally versatile for integration into industrial, commercial, or heavy-duty mechanical systems. With a **synchronous speed of 1745 RPM** at 60 Hz, this motor delivers consistent torque and speed, ensuring optimal performance in applications such as water pumps, compressors, conveyors, or HVAC systems where steady power output is critical.

Built to meet rigorous industry standards, the Century E-Plus motor features a **totally enclosed, fan-cooled (TEFC) design**, providing superior protection against dust, moisture, and corrosive environments while maintaining efficient thermal management. Its **direct-on-line (DOL) starting capability** simplifies installation and reduces the need for additional control components, making it an ideal choice for applications where quick startup and straightforward integration are essential. The motor s **high-efficiency Class B rating** ensures minimal energy consumption, translating to lower operational costs and a reduced environmental footprint over its lifespan.

Constructed from high-grade materials, including a **cast iron endbell and housing**, this motor is engineered to withstand the rigors of continuous operation, offering extended service life even in demanding conditions. The **ball-bearing support system** ensures smooth, vibration-free performance, while the **NEMA Premium efficiency designation** further underscores its commitment to energy savings and operational excellence. Whether deployed in residential water systems, commercial irrigation, or industrial processing, the Century E-Plus motor delivers the power, reliability, and efficiency required to keep operations running smoothly without compromise.

With its **compact yet sturdy frame (likely NEMA 143T or similar, depending on mounting configuration)**, this motor is designed for easy installation in tight spaces while maintaining robust structural integrity. The **low-maintenance design** reduces downtime, as the sealed construction minimizes the risk of contamination, and the **long-lasting insulation system** enhances thermal stability. Additionally, the motor s compatibility with standard control systems and its **universal voltage range** make it a flexible solution for a wide range of applications, from small-scale utilities to large-scale industrial setups. Backed by A.O. Smith s reputation for quality and innovation, the Century E-Plus motor represents a dependable investment for businesses seeking a balance of performance, efficiency, and longevity in their mechanical systems.

### **Pros and Cons of buying a AO Smith 7-349221-01 Century E Plus 1.5 HP 3-Phase Motor (200-460V, 1745 RPM, DP)**

1. **High Efficiency and Reliability**

The AO Smith Century E Plus series is known for its energy-efficient design, which can reduce operational costs over time. AO Smith is a reputable brand with a strong reputation for durability in water heater motors, ensuring long-term performance if properly maintained.

2. **Compatibility with AO Smith Water Heaters**

This motor is specifically designed as an OEM (Original Equipment Manufacturer) replacement for AO Smith s Century E Plus water heater models. Using an OEM part ensures proper fit, functionality, and compatibility with the existing system, reducing the risk of installation issues.

3. **3-Phase Motor for Commercial or High-Demand Applications**

The 1.5 HP, 3-phase motor is suitable for commercial water heating systems or high-demand residential setups where consistent power is required. The 1745 RPM speed is optimized for efficient water circulation, reducing strain on the system.

4. **Voltage Flexibility (200-460V)**

The ability to operate on both 200V and 460V systems provides flexibility in installation, depending on the existing electrical setup. This makes it a versatile choice for different regions or facilities.

5. **Direct Drive (DP) Configuration**

The direct drive (DP) design simplifies installation by eliminating the need for a belt or pulley system, reducing potential wear points and maintenance requirements.

6. **Warranty and Support**

AO Smith typically offers warranties on their parts, and purchasing directly from an authorized dealer or the manufacturer ensures access to technical support and replacement parts if needed.

---

1. **Cost**

As an OEM replacement part, this motor may be more expensive than generic or aftermarket alternatives. The premium pricing reflects AO Smith s brand reputation and quality, but it could be a significant upfront investment, especially if replacing multiple components.

2. **Limited Availability**

Since this is a specific OEM part, it may not be as widely stocked as generic motors. Purchasing from unauthorized sellers or waiting for delivery could be a challenge, particularly if the water heater is in urgent need of repair.

3. **Installation Complexity**

While the direct drive design simplifies some aspects, replacing a motor in a water heater often requires professional installation, especially if the heater is under warranty or if electrical work is involved. DIY installation could void warranties or pose safety risks.

4. **Potential for Overkill in Residential Use**

If this motor is being used in a residential setting where a smaller, single-phase motor would suffice, the higher power rating (1.5 HP) may be unnecessary, leading to higher energy consumption without proportional benefits.

5. **Depreciation and Resale Value**

Like all mechanical parts, motors depreciate over time. If the water heater is older or the motor is being replaced due to failure, the resale value of the old motor (or heater) may be minimal, making the cost of replacement a sunk expense.

6. **Maintenance Requirements**

While AO Smith motors are durable, they still require periodic maintenance, such as lubrication (if applicable), electrical checks, and ensuring the water heater s anode rod is functioning properly to prevent motor strain from mineral buildup.

---

### **Conclusion**

The AO Smith 7-349221-01 Century E Plus 1.5 HP 3-phase motor is a high-quality, reliable replacement part ideal for AO Smith water heaters in commercial or high-demand applications. Its efficiency, compatibility, and voltage flexibility make it a strong choice for systems where performance and longevity are critical. However, the higher cost, potential installation challenges, and the need for professional handling may deter some buyers, particularly in residential settings where a less powerful motor might suffice.

For **commercial or industrial use** where reliability and efficiency are paramount, this motor is a **strong recommendation**. For **residential use**, especially if the water heater is older or the motor is being replaced due to failure, evaluating whether a lower-cost, appropriately sized motor would meet the needs is advisable. Always ensure the installation is done by a licensed professional to maintain safety and warranty coverage.

- **Buy if:** You need an OEM replacement for an AO Smith Century E Plus water heater in a commercial setting, or if you prioritize long-term reliability and efficiency despite the higher cost.

- **Consider alternatives if:** You are in a residential setting with a lower power requirement, or if budget constraints make a generic motor a more practical choice. Always verify compatibility with your specific water heater model before purchasing.

Details:

Smith Century E-Plus 1.5 HP 3-Phase Motor 200-460V 1745 RPM DP.O.

part #: 734922101 prices

• $95.20-$500.00

specifications oelemot:

• brand: A.o. Smith
• mpn: 7-349221-01
• part type: Hp Motor
• actual rated input voltage: 200 V, 230 V, 460 V
• full load amps: 4.6, 4.2/2.1
• rated load: Hp
• ac frequency rating: 60 Hz
• enclosure type: Dp
• base rpm: 1745
• ac motor type: Induction/asynchronous
• mounting type: Base-mounted
• reversible/non-reversible: Reversible
• current type: Ac
• service factor: 1.15
• ac phase: Three Phase

offer oelemot:

• quantity: 1
• sold: 0
• started: April 22, 2026
• best offers: True
• options: Ship-to-home
• availability: In Stock

payments oelemot:

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

general oelemot:

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

seller oelemot:

• city: Milan, Michigan
• # reviews: 4
• rating: 100.0%

returns oelemot:

• policy: No Returns

shipping oelemot:

• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• transit: 4-10 Days
• carrier: USPS
• cost: $54.89

A.o. Smith 7-349221-01 Is Similar To:

• 117 Smith Spd Permanent Split Capacitor Motor 663001002482 (38% similar) Smith century 3HP, 825RPM 1 sped, 208-230V, permanent split capacitor motor SK FOR10...(June 29th, 2018)
• 158 Smith Ao Model Hp Rpm (34.9% similar) AI Smith 158, model HF3L042N, 3/4 hp, 1075 rpm, 460 v TB95...(April 8th, 2018)
• 2-151001-03 Smith Motor Hp (25.5% similar) Smith motor new in package. The label on motor reads pt no hp. Bought a lot of items from an air conditioning refrigeration retired man when I purchased furnace for my home...(January 7th, 2019)
• 22210300 Smith Variable Speed Dc Motor Hp Rpm Frame (31.1% similar) Happy buying and god bless. Need to move stuff quickly...(January 5th, 2019)
• 2530001 Interlink Smith Motor Csc Capacitor (23.6% similar) Smith motor 115V 1a 1050RPM. 04HP CDC 325P305H37A14NAX capacitor...(July 5th, 2018)
• 29510j2 Smith Ao Ac Motor (27.5% similar) AI Smith ac motor with Dayton 6PA33 hp 1/3 rpm v ph a...(February 26th, 2019)
• 322p794 Ao Smith Fan Motor Hp Fll Rpm New (36.8% similar) AI Smith 322P794 condenser fan motor 1/5 hp v 42Y fall 1075 rpm. 3 a new suite c manufacturer: AI Smith model: 322P794 hp: 1/5 voltage : v new, in working condition. This item is new. Marketing, listing apps, application...(October 28th, 2018)
• 322p804 Ao Smith Hp Dual Shaft Fr Motor (32.5% similar) Smith 322P804 1/1 2 hp rpm dual 2 shaft lengths: bolt face. 5 back 42 fr motor 3 month warranty 10 x 440 run capacitor included...(December 5th, 2018)
• 326p422 Ao Smith Rpm Dual Shaft Blower Motor (32.8% similar) From the date received, when installed by a certified technician...(December 5th, 2018)
• 327p781 Ac Motor By Smith Corporation (26.4% similar) Smith corporation see pictures. Ac motor by...(August 1st, 2018)
• 38776b001 Ao Smith 1-3hp Motor (33.3% similar) AI Smith 1/3 hp motor F48L68A50 460 volts 60HZ amps 1100 rpm new this is old stock. It has never been used. The box was opened to inspect contents...(February 15th, 2018)