MAGNETEK / CENTURY 8-173087-21 Ac Motor Vac Frame B652 3/4 208-230/115 E56C 3450RPM

( Brand: Magnetek / Century ), ( Manufacturer Part Number: 8-173087-21 ), ( Model: B652 ), ( Part Type: Ac Hp Motor Frame ), ( Full Load Amps: 4.7-4.6/9.2 A ), ( Iec Frame Size: E56c ), ( Rated Load: Hp ), ( Current Type: Ac ), ( Ac Frequency Rating: 60 Hz ), ( Base Rpm: 3450 ), ( Nominal Rated Input Voltage: 208-230/115 V ), ( Ac Phase: Single Phase )

Review MAGNETEK / CENTURY 3/4 Hp Ac Motor 208-230/115 Vac Frame 3450rpm

The **Magnetek Century 8-173087-21 B652 3/4 Horsepower AC Motor** is a robust, high-performance electric motor engineered for reliability, efficiency, and versatility in a wide range of industrial, commercial, and residential applications. Part of Magnetek s trusted Century series, this motor combines precision engineering with advanced design features to deliver consistent performance under demanding operating conditions. Built with a **3/4 horsepower (0.75 hp) output**, it is well-suited for applications requiring moderate power, such as HVAC systems, fans, pumps, compressors, and small industrial machinery where smooth, dependable operation is essential. The motor operates on a **dual-voltage configuration**, accepting **208-230 volts AC** for heavy-duty applications or **115 volts AC** for lighter-duty tasks, making it adaptable to various electrical setups without the need for additional components. This flexibility ensures seamless integration into existing systems, whether in commercial buildings, manufacturing plants, or residential environments.

At the heart of this motor is the **E56C frame**, a standardized design that adheres to NEMA (National Electrical Manufacturers Association) standards, ensuring compatibility with a broad spectrum of industry equipment. The **3,450 RPM (revolutions per minute) synchronous speed** provides an optimal balance between torque and efficiency, reducing energy consumption while maintaining operational smoothness. The motor s **B652 designation** indicates a specific winding configuration and protection class, typically offering **drip-proof (DP) or splash-proof (SP) protection**, depending on the application, which safeguards internal components from dust, moisture, and debris. This level of protection is particularly valuable in environments where exposure to the elements or airborne contaminants is a concern, such as outdoor installations, agricultural equipment, or industrial settings with moderate exposure to harsh conditions.

Constructed with **high-grade materials**, the Century 8 motor features a durable **cast aluminum or steel endbell housing**, which resists corrosion and mechanical stress, ensuring longevity even under prolonged use. The rotor and stator are meticulously designed to minimize friction and heat buildup, contributing to extended motor life and reduced maintenance requirements. The **ball-bearing or sleeve-bearing construction** (depending on the specific model variant) provides smooth operation and low vibration, reducing wear on connected machinery and enhancing overall system reliability. Additionally, the motor s **efficient winding and magnetic design** optimize power conversion, resulting in lower energy costs and reduced operational overhead for end-users.

For applications requiring precise control and energy savings, this motor can be paired with **Magnetek s Century series variable frequency drives (VFDs)**, allowing for speed adjustments, soft starts, and reduced mechanical stress on connected equipment. The motor s compact yet sturdy **E56C frame** also facilitates easy installation and maintenance, with standard mounting configurations that align with industry best practices. Whether integrated into an HVAC system for climate control, a ventilation unit for air circulation, or a small-scale manufacturing process, this motor delivers **consistent performance, quiet operation, and minimal downtime**, making it a dependable choice for professionals seeking a balance of power, efficiency, and durability.

In summary, the **Magnetek Century 8-173087-21 B652 3/4 HP AC Motor** is a well-engineered, versatile electric motor designed to meet the demands of modern industrial and commercial applications. With its **dual-voltage capability, NEMA-compliant E56C frame, 3,450 RPM synchronous speed, and robust construction**, it offers a reliable solution for a variety of power needs while prioritizing energy efficiency and operational longevity. Ideal for applications where precision, durability, and adaptability are critical, this motor exemplifies Magnetek s commitment to delivering high-performance electric solutions that stand the test of time.

### **Pros and Cons of buying a Magnetek Century 8-173087-21 (B652, 3/4 HP, AC Motor, 208-230/115V, E56C Frame, 3450 RPM)**

1. **Reliable Brand Reputation** Magnetek is a well-established manufacturer known for producing durable industrial motors, particularly in the HVAC and commercial equipment sectors. Their motors are often used in applications requiring consistent performance.

2. **Dual Voltage Capability (115V/208-230V)** The motor s ability to operate on both single-phase (115V) and three-phase (208-230V) power makes it versatile for different electrical setups, reducing compatibility issues in various installations.

3. **Standard E56C Frame** This frame size is common in the industry, meaning replacement parts, bearings, and accessories are widely available. It also ensures compatibility with many existing systems.

4. **3/4 Horsepower Rating** Suitable for moderate-duty applications such as small HVAC units, fans, pumps, or light-duty machinery. It provides enough power for typical commercial or light industrial tasks without being overly large or expensive.

5. **3450 RPM Speed** This speed is standard for many small motors, making it compatible with fans, blowers, and other equipment that operate efficiently at this RPM range.

6. **Potential for Long Lifespan** If properly maintained, Magnetek motors are known for lasting decades, especially in applications with moderate workloads.

7. **Energy Efficiency** While not classified as a premium energy-efficient motor, it is designed to operate efficiently for its power rating, reducing unnecessary energy consumption compared to older or poorly designed motors.

8. **Easy to Install and Replace** The standard frame and common mounting configurations make it straightforward to install, even for those with basic mechanical skills.

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1. **Not Energy-Efficient by Modern Standards** This motor is likely a standard induction motor rather than a premium efficiency (IE3 or IE4) model. For new installations, a more energy-efficient motor could lead to long-term cost savings.

2. **Limited Warranty (Typical for Basic Motors)** Magnetek s standard warranty for such motors is usually 1 2 years, which may not cover long-term reliability concerns. Extended warranties or commercial-grade motors may offer better protection.

3. **Potential for Higher Maintenance Needs** Older or standard motors may require more frequent bearing lubrication, brush replacements (if it s a brushed motor), or other upkeep compared to modern sealed or maintenance-reduced designs.

4. **Noisy Operation (Possible)** Some standard AC motors, especially at higher RPMs, can produce more vibration and noise than premium or specially designed motors. This may be an issue in sensitive environments.

5. **Compatibility with Modern Controls** If the motor is paired with variable frequency drives (VFDs) or smart controls, compatibility may not be guaranteed without additional considerations (e.g., VFD-rated motor).

6. **Limited Customization** Unlike some high-end motors, this model does not offer additional features such as built-in sensors, advanced protection, or customizable mounting options.

7. **Potential for Higher Operating Costs** If the motor is not energy-efficient, it may consume more electricity over time, increasing operational expenses, especially in continuous-use applications.

8. **Resale Value** Standard motors like this typically have lower resale value compared to premium or branded motors with extended warranties.

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The **Magnetek Century 8-173087-21** is a **functional, reliable, and cost-effective choice** for **light-duty to moderate-duty applications** where budget and simplicity are priorities. It excels in **compatibility, dual-voltage flexibility, and durability** for basic HVAC, fan, or pump systems. However, it **lacks modern energy efficiency standards**, may require **more maintenance**, and could be **less ideal for high-performance or long-term cost-saving applications**.

For **new installations or energy-conscious projects**, a **premium efficiency motor (IE3 or IE4)** or a **VFD-rated motor** might be a better long-term investment despite a higher upfront cost. If the motor is being used in an **existing system where compatibility is critical** and **cost is a major factor**, this Magnetek motor remains a **practical and dependable option**.

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- You need a **reliable, standard AC motor** for a **budget-friendly application** (e.g., replacing an old motor in a fan, small HVAC unit, or pump).

- **Dual-voltage compatibility** is essential for your electrical setup.

- You prioritize **availability of parts** and **ease of installation**.

- The motor will operate in **moderate conditions** without extreme environmental stress.

- You require **higher energy efficiency** (look for **IE3 or IE4-rated motors**).

- The motor will run **24/7 in demanding conditions** (consider a **premium or explosion-proof motor**).

- You need **VFD compatibility** (ensure the motor is rated for variable frequency drives).

- Long-term **cost savings** are a priority (a slightly more expensive but efficient motor may pay off over time).

- Verify **voltage compatibility** with your system before purchase.

- Check if the motor is **VFD-rated** if you plan to use a variable frequency drive.

- Ensure proper **ventilation and maintenance access** to extend its lifespan.

- If possible, **compare with newer energy-efficient models** to assess long-term savings.

This motor is a **solid workhorse for basic applications**, but **modern alternatives may offer better efficiency and reliability** for more demanding or cost-sensitive projects.

Details:

Original factory packaging is not included. Item has not been tested and is sold as-is. MAGNETEK B652 3/4 HP AC MOTOR 208-230/115 VAC E56C FRAME 3450RPM 8-173087-21, Used item. May show cosmetic wear from previous use and storage, including scratches, scuffs, marks on the body/housing.

part #: 817308721 price

• $99.00

specifications oelemot:

• brand: Magnetek / Century
• mpn: 8-173087-21
• model: B652
• part type: Ac Hp Motor Frame
• full load amps: 4.7-4.6/9.2 A
• iec frame size: E56c
• rated load: Hp
• current type: Ac
• ac frequency rating: 60 Hz
• base rpm: 3450
• nominal rated input voltage: 208-230/115 V
• ac phase: Single Phase

payments oelemot:

• other
• wallet: Paypal
• credit card: Diners-club

returns oelemot:

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

seller oelemot:

• city: Brighton, Massachusetts
• # reviews: 73
• rating: 100.0%

general oelemot:

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

shipping oelemot:

• transit: 3-8 Days
• cost: $33.05
• class: Standard, Economy
• type: Calculated
• carrier: UPS, FedEx
• service: UPS Ground, FedEx Ground Economy

offer oelemot:

• started: March 3, 2026
• availability: In Stock
• best offers: True
• sold: 0
• quantity: 1
• options: Ship-to-home

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