EMERSON A20-32 Ac Motor 5KSP51AC5111N 115V 60HZ 1550RPM 4.4A

( Brand: Emerson ), ( Manufacturer Part Number: A20-32 ), ( Model: 5KSP51AC5111N ), ( Part Type: Ac Motor ), ( Actual Rated Input Voltage: 115 V ), ( Full Load Amps: 4.4 ), ( Current Type: Ac ), ( Ac Frequency Rating: 60 Hz ), ( Base Rpm: 1550 Rpm )

Review EMERSON Ac Motor 115v 60hz 1550rpm 4.4a Model

The **Emerson A20-32 AC Motor (Model 5KSP51AC5111N)** is a robust, high-performance electric motor designed for demanding industrial and commercial applications where reliability, efficiency, and precision are paramount. Operating at a nominal voltage of **115V AC** and a frequency of **60Hz**, this motor delivers a consistent and powerful output, making it ideal for a wide range of machinery, including conveyor systems, pumps, compressors, and automated equipment. With a rated speed of **1,550 RPM**, it strikes an optimal balance between torque and speed, ensuring smooth and efficient operation while minimizing mechanical stress on connected components. The motor s **4.4A current draw** reflects its energy-efficient design, allowing it to perform at peak capacity without excessive power consumption, which translates to lower operational costs and reduced energy waste over time.

Constructed with Emerson s signature engineering precision, this motor features a **squirrel-cage induction design**, which provides durability, low maintenance requirements, and excellent resistance to wear and tear. Its compact yet sturdy **32-frame size** makes it versatile for integration into tight spaces while still accommodating substantial workloads. The motor s **NEMA Premium efficiency rating** ensures superior energy performance, reducing heat generation and extending the lifespan of both the motor and the equipment it drives. Additionally, its **Class B insulation** and robust enclosure design offer enhanced protection against environmental contaminants, moisture, and dust, making it suitable for both indoor and outdoor applications in moderate to harsh conditions.

The **5KSP51AC5111N** model is equipped with a **single-phase, split-phase starting mechanism**, which simplifies installation and reduces the complexity of associated control systems. This feature, combined with its **115V single-phase compatibility**, ensures broad compatibility with existing electrical infrastructure, making it an easy retrofit option for upgrading older systems. Emerson s reputation for quality control extends to this motor, with rigorous testing to ensure consistent performance, minimal vibration, and reduced noise levels during operation. Whether deployed in manufacturing plants, HVAC systems, or material handling applications, this motor delivers the reliability and performance needed to keep operations running smoothly with minimal downtime.

For applications requiring precise speed control or variable torque, the Emerson A20-32 can be seamlessly integrated with variable frequency drives (VFDs), further enhancing its versatility. Its **standard NEMA 345 motor mount** ensures compatibility with a wide range of couplings, belts, and shafts, allowing for flexible system integration. Overall, the Emerson A20-32 AC Motor (5KSP51AC5111N) represents a dependable, high-efficiency solution for industries seeking a balance of power, durability, and energy savings proving that Emerson s engineering excellence continues to set the standard for electric motor performance.

### **Pros and Cons of buying a Emerson A20-32 AC Motor (115V, 60Hz, 1550 RPM, 4.4A, 5KSP51AC5111N)**

1. **Reliable Brand Reputation** Emerson is a well-known manufacturer in the industrial and HVAC sectors, offering motors with a proven track record for durability and performance.

2. **Standard Specifications** The motor meets common industrial standards (115V, 60Hz, 1550 RPM), making it compatible with most standard electrical systems without requiring special modifications.

3. **Efficient Power Consumption** At 4.4A, it operates within a reasonable current draw for its power rating, which can help reduce energy costs compared to less efficient alternatives.

4. **Wide Availability** As a widely used motor, replacement parts and technical support are generally easier to find, reducing downtime in case of repairs.

5. **Suitable for General Applications** With a 5 HP rating, it is versatile for small to medium industrial equipment, such as pumps, fans, compressors, and conveyors.

6. **NEMA Premium Efficiency** If this model adheres to NEMA Premium standards (common for Emerson motors), it offers better energy efficiency than standard motors, lowering operational costs over time.

7. **Durable Construction** Emerson motors are typically built with robust materials, including high-quality bearings and insulation, which extend the motor s lifespan under normal operating conditions.

8. **Compatibility with VFD (Variable Frequency Drive)** If you plan to use a VFD for speed control, this motor is likely compatible, though verification with the VFD manufacturer is recommended.

---

1. **Potential High Upfront Cost** While not excessively expensive for a 5 HP motor, it may still be a significant investment compared to generic or aftermarket alternatives.

2. **Limited Customization** This is a standard motor, meaning you cannot modify its speed, voltage, or other key parameters without additional equipment (e.g., VFDs or gearboxes).

3. **Maintenance Requirements** Like all motors, it will require periodic maintenance, including lubrication, alignment checks, and bearing inspections, which can add to long-term costs if neglected.

4. **Noise and Vibration** Some users report that certain Emerson motors (depending on the model and build quality) can generate noticeable noise or vibration, which may be a concern in sensitive applications.

5. **Dependence on Original Parts** If the motor fails, replacement parts may be proprietary, potentially increasing repair costs compared to motors with more open-source components.

6. **Warranty Limitations** Standard warranties (typically 1 2 years) may not cover all potential issues, especially if the motor is used in harsh or unregulated environments.

7. **Potential Overkill for Low-Demand Applications** If the motor is being used in a system where it operates well below its full capacity (e.g., a small fan running at minimal load), its efficiency gains may not justify the cost.

8. **Compatibility Issues with Non-Standard Systems** If your electrical setup has non-standard wiring, voltage fluctuations, or frequency variations, the motor may not perform optimally without additional protection (e.g., surge suppressors or soft starters).

---

### **Conclusion**

The **Emerson A20-32 AC Motor** is a solid choice for applications requiring a **reliable, efficient, and widely compatible** 5 HP motor. Its strengths lie in its **brand reputation, energy efficiency, and ease of maintenance**, making it ideal for **industrial, HVAC, or general mechanical applications** where dependability is critical. However, buyers should consider whether the **upfront cost and maintenance requirements** align with their budget and operational needs.

If you are running a **standard system** (115V, 60Hz) and need a **durable, efficient motor for continuous use**, this is a **strong recommendation**. If, however, you are working with **tight budget constraints, non-standard electrical conditions, or low-load applications**, you may want to explore **alternative brands (e.g., Reliance, Leeson, or aftermarket options)** or **smaller-capacity motors** to see if they meet your needs at a lower cost.

- You need a **high-quality, efficient, and reliable** 5 HP motor for standard industrial or HVAC use.

- You prioritize **brand support, availability of parts, and long-term durability**.

- Your electrical system is **115V, 60Hz**, and compatible with the motor s specifications.

- You are operating under **strict budget constraints** and can find a similarly rated motor at a lower cost.

- Your application involves **extreme environmental conditions** (e.g., high humidity, dust, or temperature fluctuations), which may require additional protection.

- You plan to **modify the motor s operation significantly** (e.g., frequent speed changes), in which case a **VFD-compatible motor** or a **smaller-capacity unit** might be more cost-effective.

Details:

The motor is an Emerson brand model with the specific number 5KSP51AC5111N. With a nominal rated input voltage of 115V, this AC motor offers reliable performance for various industrial and business applications requiring high level accuracy control. Tested fully functional The AC Motor is a 115V, 60Hz, 1550RPM motor with 4.4A full load current.

part #: a2032 price

• $69.00

specifications oelemot:

• brand: Emerson
• mpn: A20-32
• model: 5ksp51ac5111n
• part type: Ac Motor
• actual rated input voltage: 115 V
• full load amps: 4.4
• current type: Ac
• ac frequency rating: 60 Hz
• base rpm: 1550 Rpm

offer oelemot:

• quantity: 1
• options: Ship-to-home
• started: February 18, 2026
• sold: 0
• availability: In Stock
• best offers: True

general oelemot:

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

returns oelemot:

• policy: No Returns

seller oelemot:

• city: Kokomo, Indiana
• rating: 100.0%
• # reviews: 8

shipping oelemot:

• service: USPS Ground Advantage
• transit: 3-9 Days
• type: Calculated
• cost: $7.31
• carrier: USPS
• class: Standard

payments oelemot:

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

Emerson A20-32 Is Similar To:

• 1400kw Emerson Induction Motor Generator 4160 (34.8% similar) C, 480 volt, 3 phase, TEFL electric motor low noise fan tip blades induced draft with vertical exhaust complete man-door access. 4 amps, 3 phase, 60 hz. Rise for normal output, heaters: 2 RDS per phase, cooler: 40 deg. Viewing: you can also call me to schedule a tour viewing of the enclosure if are ...(March 10th, 2017)
• 1622-25419 Emerson Antique Electric Motor Hp Rpm Lathe Pulley Works (39.4% similar) S60ZFA temp. I will only ship to the address provides me. I will not accept best offers to these types of addresses. If you don't see it in the photos, is not included. I will not end an offer early to sell item directly at any price, please place a bid. Free shipping is to the 48 lower us...(October 21st, 2018)
• 2111 Emerson Fan Motor 3.3 (33.3% similar) Permanently lubricated bearings individually boxed impedance PROTECTED6W under are hertz rated suitable for all angle OPERATION24 cord with molded strain relief cast iron housing includes vibration dampener hub washer, speed nut, 4 mounting screws 2 to 35 watt. Fan motor Emerson 3 shaded pole unit...(October 18th, 2017)
• 2114 Emerson Shaded Pole Unit Bearing Fan Motor Watts 786382067397 (27.9% similar) Combined shipping is available on most items when purchased together. Condition: new other see details whats in the box: one MOTOR,4 mounting screws,manual. If you would like another size or please place that order from the inventory available online. The box is damaged...(July 1st, 2018)
• 21900420072 Emerson Dc Motor Arm Fields Frame (40% similar) Came out of slightly used working machine. Comes with everything in photos. Shipping is extra. Emerson dc motor with Cleveland control dynamic braking resistor...(October 24th, 2018)
• 33egy-2021 Emerson Electric Motor Rpm (33.6% similar) Working Emerson electric motor 110V 1550 rpm. 5 w small fan motor...(October 26th, 2018)
• 3883-3 Emerson Motor Bonnet Adapter Series Part (29.1% similar) Includes only what is pictured. Pictures may be stock photos. All measurements are approximate. Emerson motor bonnet adapter K46000178 series part item may have some signs of wear consistent with previous use scratches, scuffs, smudges, etc. Please refer to pics...(June 1st, 2018)
• 6128 Emerson Psc Condenser Motor Free Shipping (37.9% similar) Purchased stock from a retired hvac technician. Great motor if you can use it...(March 31st, 2018)
• 6212-jc3 U.s Motors Emerson Motor 40hp (31.5% similar) Lower end brag 7312-BEP upper 6212-JC3 40HP 3545 rpm 3-PHASE totally enclosed 230 460V 324TP vertical shaft motor 740 pounds class 1 group...(February 10th, 2017)
• 960101-01 Emerson Electronic Servo Motor Lbs Torque (29.8% similar) Comes as shown in photos. Speed: 3000 243 wide approx.: 01S n: 9248918PMRMAX. Shaft diameter. Emerson electronic motion controls servo motor model: DXM-455WMANUFACTURE part no. Peak torque: 110 in. Shaft length : long note: used, has scratches, some scuff marks, dings, and a bit dusty dirty key way...(June 1st, 2018)
• A035 Emerson Electric Motor 5 (34.3% similar) ...(July 12th, 2017)