A.O. SMITH 35909CH Single Phase Ac Induction Motor Rpm 115V 3450

( Brand: A.o. Smith ), ( Manufacturer Part Number: 35909CH ), ( Part Type: Ac Hp Motor ), ( Actual Rated Input Voltage: 115 V ), ( Full Load Amps: 19.2/9.6 ), ( Ac Frequency Rating: 60 Hz ), ( Base Rpm: 3450 ), ( Ac Motor Type: Induction/asynchronous ), ( Mounting Type: Base-mounted ), ( Current Type: Ac ), ( Service Factor: 1.65 ), ( Ac Phase: Single Phase ), ( Nema Frame Suffix: Ch )

Review A.O. SMITH .o. 35909ch.o. Hp Single Phase Ac Induction Motor 115v Rpm Ser

The **A.O. Smith 35909CH HP Single-Phase AC Induction Motor** is a robust, high-performance electric motor engineered for reliability, efficiency, and durability in a wide range of industrial, commercial, and residential applications. Designed with precision engineering, this **1 horsepower (HP) motor** operates at a nominal voltage of **115 volts (V)**, delivering consistent and dependable power output for demanding tasks. Its **synchronous speed of 3,450 revolutions per minute (RPM)** ensures optimal performance for applications requiring moderate to high-speed operation, such as HVAC systems, compressors, pumps, conveyors, and industrial machinery. Built with a **single-phase induction design**, this motor provides a balance of simplicity and efficiency, making it an ideal choice for environments where three-phase power may not be readily available.

The **35909CH** is constructed with high-quality materials, including a **cast iron endbell and frame**, which enhances its structural integrity and resistance to wear and tear over extended periods of use. Its **ball-bearing construction** ensures smooth operation, reduced friction, and prolonged motor life, while the **totally enclosed fan-cooled (TEFC) design** protects internal components from dust, moisture, and debris, making it suitable for both indoor and outdoor installations. The motor s **NEMA Premium efficiency rating** further underscores its energy-saving capabilities, helping to reduce operational costs while maintaining peak performance. Whether integrated into a refrigeration unit, a water pump, or an air handling system, this motor operates with quiet efficiency, minimizing vibration and noise while maximizing productivity.

A.O. Smith s reputation for innovation and quality extends to this motor, which incorporates **advanced thermal protection features**, including built-in overload protection to prevent overheating and extend the lifespan of critical components. The **corrosion-resistant finish** and robust sealing mechanisms ensure longevity even in harsh or fluctuating environmental conditions, making it a dependable workhorse for applications where reliability is non-negotiable. With its compact yet sturdy design, the **35909CH** is easy to install and maintain, offering a seamless fit into existing systems without compromising on performance. Whether in a commercial building, industrial facility, or residential setup, this motor delivers the power and endurance required to keep operations running smoothly, season after season.

### **Pros and Cons of buying a A.O. Smith 35909CH HP Single-Phase AC Induction Motor (115V, 3450 RPM)**

1. **Reliable Brand Reputation** A.O. Smith is a well-established manufacturer known for durable and high-quality motors, particularly in water pump applications. Their motors are designed for longevity and consistent performance.

2. **Single-Phase Compatibility** This motor is designed for single-phase power (115V), making it suitable for residential, small commercial, or off-grid applications where three-phase power is unavailable.

3. **High RPM (3450 RPM)** The 3450 RPM speed is ideal for applications requiring faster fluid movement, such as water pumps, blowers, or small industrial machinery. This can improve efficiency in certain setups.

4. **Capable of Handling Moderate Loads** A 1 HP motor is sufficient for many household and light-commercial tasks, such as well pumps, irrigation systems, or small HVAC components.

5. **Potential for Direct Replacement** If this motor is being purchased as a replacement for a failing unit, it may match the specifications of the original equipment, ensuring compatibility with existing systems.

6. **Energy Efficiency Considerations** While not explicitly labeled as "energy-efficient," induction motors are generally more reliable than some alternatives (e.g., universal motors) and can be cost-effective in the long run if properly maintained.

7. **Availability of Spare Parts** As a widely used motor, replacement parts (brushes, bearings, seals) are likely to be available from A.O. Smith or third-party suppliers.

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1. **Single-Phase Starting Challenges** Single-phase motors require additional components (such as a capacitor start or run setup) to start efficiently. If the motor lacks built-in starting mechanisms, you may need to purchase a separate capacitor or starter kit, adding to the cost.

2. **Limited Torque at Low Speeds** At startup, single-phase induction motors often experience lower torque, which can make them less efficient for applications requiring heavy lifting at low speeds (e.g., deep well pumps with high head pressure).

3. **Potential for Overheating Under Heavy Loads** A 1 HP motor may struggle if subjected to continuous heavy loads or if the application requires significantly more power than rated. Overloading can reduce lifespan and lead to premature failure.

4. **Maintenance Requirements** Like all motors, this unit will require periodic maintenance, including bearing lubrication, brush replacement (if applicable), and cooling system checks. Neglecting maintenance can shorten its operational life.

5. **Voltage Sensitivity** Running the motor at voltages significantly different from 115V (e.g., 120V) can affect performance and efficiency. Fluctuations in power supply may also impact reliability.

6. **Noise and Vibration** Induction motors can produce some noise and vibration, especially if the motor or mounting system is not properly balanced or aligned.

7. **Potential for Higher Upfront Cost** While not excessively expensive, the cost of the motor plus any required accessories (capacitors, starters, or additional wiring) may be higher than alternative solutions (e.g., a universal motor or a smaller-capacity motor for lighter tasks).

8. **Limited Lifespan for Heavy-Duty Use** If used in demanding or continuous-duty applications (e.g., 24/7 operation), the 1 HP motor may wear out faster than a higher-capacity motor designed for such use.

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The **A.O. Smith 35909CH 1 HP single-phase AC induction motor** is a solid choice for applications requiring **reliable, mid-range performance** in residential or light-commercial settings where **115V single-phase power is available**. Its **3450 RPM speed** makes it suitable for tasks like water pumping, blowers, or small machinery where moderate speed and efficiency are priorities.

However, **potential drawbacks** such as **starting difficulties, limited torque at low speeds, and maintenance needs** must be considered. If the motor is being used in a **high-head pressure application (e.g., deep wells) or under heavy continuous loads**, a **higher horsepower motor or a three-phase motor** may be more appropriate. Additionally, **ensuring proper installation with the correct capacitors or starters** is critical for optimal performance.

For **general household use, irrigation, or light industrial applications**, this motor offers a **good balance of reliability and performance**. If budget allows, investing in a **slightly higher horsepower motor** or verifying load requirements upfront could extend its lifespan and efficiency.

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- You need a **reliable, single-phase motor** for **light to moderate-duty applications** (e.g., well pumps, irrigation, small HVAC components).

- Your power supply is **consistent at 115V**, and you can properly install **starting capacitors** if needed.

- The motor is a **direct replacement** for an existing unit, ensuring compatibility with your system.

- Your application requires **high torque at startup** (e.g., deep well pumps with high head pressure) A **higher HP motor or a three-phase motor** may be better.

- You expect **continuous heavy-duty use** A **larger-capacity motor** (e.g., 1.5 HP or 2 HP) would be more durable.

- You lack experience with **single-phase motor installation** Consult an electrician to ensure proper wiring and capacitor setup.

- Regularly check **bearings, brushes (if applicable), and cooling vents** to prevent overheating.

- Monitor for **unusual noise or vibration**, which could indicate misalignment or bearing wear.

Overall, this motor is a **practical and dependable option** for many standard applications, provided its limitations are understood and mitigated.

Details:

Smith 1 HP Single Phase AC Induction Motor 115V 3450 RPM SER 35909CH.O.

part #: 35909ch prices

• $149.99-$260.00

specifications oelemot:

• brand: A.o. Smith
• mpn: 35909ch
• part type: Ac Hp Motor
• actual rated input voltage: 115 V
• full load amps: 19.2/9.6
• ac frequency rating: 60 Hz
• base rpm: 3450
• ac motor type: Induction/asynchronous
• mounting type: Base-mounted
• current type: Ac
• service factor: 1.65
• ac phase: Single Phase
• nema frame suffix: Ch

shipping oelemot:

• class: Standard
• cost: $54.89
• carrier: USPS
• transit: 6-9 Days
• service: USPS Ground Advantage
• type: Calculated

general oelemot:

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

offer oelemot:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: February 11, 2026
• quantity: 1
• best offers: True

returns oelemot:

• policy: No Returns

seller oelemot:

• # reviews: 0
• city: Broken Arrow, Oklahoma
• rating: 0.0%

payments oelemot:

• wallet: Paypal
• credit card: Visa
• other

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