CUTLER HAMMER AS4.3 Eaton

( Brand: Cutler Hammer ), ( Manufacturer Part Number: AS4.3 )

Review CUTLER HAMMER Eaton Corporation As43 Used

The **Cutler-Hammer AS4.3 (Eaton AS43)** is a robust, medium-voltage motor control center designed for industrial and commercial applications requiring reliable, high-performance electrical protection and control. Part of Eaton s renowned AS4 series, this compact yet powerful motor control center is engineered to meet the demanding needs of manufacturing plants, processing facilities, and other industrial environments where consistent operation and safety are paramount. With a robust steel construction and a modular design, the AS4.3 offers exceptional durability, ensuring long-term performance even in harsh conditions. Its compact footprint allows for efficient space utilization in control rooms or electrical distribution areas, while its scalable architecture accommodates a wide range of motor sizes and control requirements, from small to medium horsepower applications.

At the heart of the AS4.3 is Eaton s advanced **AS43 circuit breaker technology**, featuring a **vacuum interrupter design** that provides superior arc interruption capability, minimizing wear and extending the life of the breaker. This design ensures rapid and reliable fault clearing, reducing downtime and protecting both the motor and the electrical system from damage caused by overloads, short circuits, or phase imbalances. The motor control center incorporates **Eaton s AS43 circuit breakers**, which are equipped with **thermal and magnetic trip units**, allowing for precise protection against overcurrent conditions while maintaining operational efficiency. Additionally, the AS4.3 supports **remote monitoring and control** through Eaton s **PowerLogic** or **Eaton s Motor Control Center (MCC) management systems**, enabling real-time diagnostics, predictive maintenance, and remote shutdown capabilities for enhanced operational flexibility.

The AS4.3 is engineered with **modular flexibility**, allowing users to customize the control center with a variety of **disconnect switches, fuses, contactors, and auxiliary relays** to suit specific application needs. This modularity ensures that the system can be easily expanded or reconfigured as operational requirements evolve, reducing the need for costly retrofits. The control center also features **enhanced safety mechanisms**, including **interlocked doors** and **grounding provisions**, to prevent accidental contact with live parts and ensure compliance with industry safety standards such as **NFPA 79** and **OSHA regulations**. The robust **IP21 or IP23** enclosure rating provides protection against solid objects and limited water ingress, making it suitable for environments with moderate exposure to dust, moisture, or corrosive atmospheres.

For applications requiring **energy efficiency and operational intelligence**, the AS4.3 can be integrated with **Eaton s PowerXpert** or **MotorMaster ** software, enabling advanced motor management features such as **soft start, variable frequency drive (VFD) compatibility, and energy monitoring**. These features help optimize motor performance, reduce energy consumption, and extend equipment lifespan by minimizing mechanical stress during startup and operation. The control center also supports **Eaton s AS43 s built-in communication interfaces**, including **Modbus, Profibus, or Ethernet/IP**, allowing seamless integration with **SCADA systems, PLCs, or building automation networks** for centralized control and monitoring.

Overall, the **Cutler-Hammer AS4.3 (Eaton AS43)** is a versatile, high-performance motor control center that delivers **reliability, safety, and efficiency** in demanding industrial applications. Whether used in **manufacturing, HVAC systems, water treatment plants, or material handling operations**, this control center provides a **durable, scalable, and intelligent** solution for motor protection and control. With Eaton s reputation for innovation and quality, the AS4.3 ensures that industrial facilities can operate with confidence, minimizing downtime and maximizing productivity.

**Pros and Cons of Buying a Cutler-Hammer AS4.3 (Eaton AS43) Automatic Transfer Switch (ATS)**

### **Pros**

1. **Reliability and Durability** The AS4.3 series is known for robust construction, designed to withstand frequent switching cycles, making it suitable for critical applications like backup power systems.

2. **Wide Voltage and Current Ratings** It supports a broad range of voltages (120V, 240V, 480V) and currents (up to 400A), allowing flexibility for different electrical setups.

3. **Manual and Automatic Operation** The unit can be manually operated for testing or maintenance, while automatic operation ensures seamless failover during power interruptions.

4. **Compliance with Standards** Meets UL, CSA, and NEC standards, ensuring safety and regulatory compliance in residential, commercial, and industrial applications.

5. **Modular Design** Some configurations allow for easy expansion or modification, accommodating future electrical load increases.

6. **Remote Monitoring Capabilities** Certain models support remote control and monitoring, improving system management and troubleshooting.

7. **Proven Performance in Backup Systems** Frequently used in generator backup setups, making it a trusted choice for uninterrupted power supply.

### **Cons**

1. **Higher Initial Cost** Compared to basic manual transfer switches, the AS4.3 is more expensive due to its advanced features and reliability.

2. **Complex Installation** Requires professional electrical expertise, especially for proper wiring, grounding, and integration with generator systems.

3. **Maintenance Requirements** While durable, periodic inspections and maintenance (e.g., contact cleaning, testing) are necessary to ensure optimal performance.

4. **Size and Space Constraints** Larger models may require significant panel or enclosure space, which could be a limitation in tight installations.

5. **Potential for False Tripping** In some cases, sensitive electronics or poor wiring can cause unintended switching, requiring troubleshooting.

6. **Limited Customization for Very Specific Needs** While versatile, extreme customization (e.g., unique control logic) may require additional components or modifications.

7. **Depreciation Over Time** Like most electrical equipment, it may lose value after several years, though its reliability often outweighs this concern.

### **Conclusion**

The Cutler-Hammer AS4.3 (Eaton AS43) is a high-quality automatic transfer switch ideal for applications requiring reliable power transfer, such as generator backups, critical load protection, or industrial applications. Its strengths in durability, compliance, and performance justify the higher cost for users prioritizing dependability. However, the complexity of installation and maintenance, along with the initial expense, may deter smaller-scale or budget-conscious projects.

### **Recommendation**

- You need a dependable, long-term solution for backup power or critical load management.

- Your application demands frequent switching cycles without failure.

- You can invest in professional installation and occasional maintenance.

- Your budget is tight, and a simpler manual transfer switch or a lower-end automatic model suffices.

- The installation space is extremely limited, and a compact alternative (e.g., Eaton s smaller ATS series) would work.

- You lack the expertise for proper setup and troubleshooting, as improper installation can void warranties or cause safety hazards.

For most commercial, industrial, or high-reliability residential applications, the AS4.3 remains a strong, well-supported choice. Always consult with a licensed electrician to ensure compatibility with your specific system.

Details:

Call to use a shipping service other than the ones listed. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Sells new and surplus product develops channels to purchase such.

Part Number AS4.3.

part #: as43 prices

• $7.94-$15.00

specifications automationjack:

• brand: Cutler Hammer
• mpn: As4.3

seller automationjack:

• # reviews: 192448
• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.6%

shipping automationjack:

• class: Standard
• cost: $12.90
• type: Fixed
• service: Standard
• transit: 22-34 Days

returns automationjack:

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

offer automationjack:

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

general automationjack:

• condition: Used
• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

payments automationjack:

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

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