CUTLER HAMMER 9-1945-8 Eaton

( Brand: Cutler Hammer ), ( Manufacturer Part Number: 9-1945-8 )

Review CUTLER HAMMER Eaton Corporation 919458 Used

The **Cutler-Hammer 9-1945-8 (Eaton 919458)** is a robust, high-performance **low-voltage motor control power circuit breaker**, designed to provide reliable protection for industrial and commercial electrical systems. Part of Eaton s renowned **PowerXpert** line of motor control products, this breaker is engineered to safeguard motors, transformers, and other critical loads from overloads, short circuits, and ground faults, ensuring operational continuity while minimizing downtime. With a **continuous current rating of 100 amps** and a **tripping curve tailored for motor applications**, it delivers precise protection against thermal and magnetic faults, making it ideal for applications in manufacturing plants, HVAC systems, pump stations, and other demanding environments where motor-driven equipment is prevalent.

Constructed with **high-quality materials**, including a durable **molded case** and robust internal components, the 9-1945-8 offers exceptional mechanical and electrical endurance. Its **instantaneous trip unit** provides fast response to short circuits, while the **thermal magnetic trip mechanism** ensures gradual but effective overload protection, preventing damage to connected equipment. The breaker features a **compact yet sturdy design**, allowing for efficient panel integration while maintaining ease of installation and maintenance. Its **modular construction** also enables seamless retrofitting into existing control panels, reducing downtime during upgrades.

Beyond its protective capabilities, the **Cutler-Hammer 9-1945-8** incorporates advanced **Eaton s PowerXpert technology**, which enhances monitoring and diagnostics through integrated **digital communication interfaces** (such as Modbus or Profibus) for seamless integration into building management systems (BMS) or SCADA platforms. This level of connectivity allows facility managers to remotely monitor breaker status, receive fault alerts, and optimize energy efficiency reducing operational costs and improving system reliability. The breaker s **adjustable trip settings** further customize protection parameters to match specific motor loads, ensuring optimal performance across a variety of applications.

Whether deployed in **commercial buildings, industrial facilities, or renewable energy systems**, the **Eaton 919458** stands as a dependable guardian of electrical infrastructure. Its **long service life, minimal maintenance requirements, and adherence to strict safety standards** (including UL, CSA, and NEC compliance) make it a trusted choice for engineers and electricians seeking a balance of performance, durability, and innovation. With its combination of **mechanical resilience, intelligent protection, and adaptability**, this motor control breaker ensures that critical equipment operates safely and efficiently, even under the most challenging conditions.

### **Cutler-Hammer 9-1945-8 (Eaton 919458) Motor Control Center (MCC) Pros and Cons**

The **Cutler-Hammer 9-1945-8 (Eaton 919458)** is a legacy motor control center (MCC) designed for industrial applications, offering robust protection and control for electric motors. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

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### **Pros**

1. **Reliable and Durable Construction**

- Built with heavy-duty materials, including steel enclosures, ensuring long-term durability in harsh industrial environments.

- Designed for high-current applications, making it suitable for demanding industrial settings.

2. **Modular and Expandable Design**

- The MCC follows a modular architecture, allowing for easy expansion by adding more motor starters or control components.

- Compatible with a wide range of Cutler-Hammer (Eaton) motor starters, contactors, and overload relays, providing flexibility in system configuration.

3. **Superior Motor Protection Features**

- Equipped with **thermal overload relays** that protect motors from overheating due to overloads or faults.

- Some configurations include **magnetic trip devices** for short-circuit and ground fault protection.

- Supports **manual or automatic restart** functionality, improving operational efficiency.

4. **High Current and Voltage Ratings**

- Capable of handling high amperage loads (typically up to **1,200 amps per starter**, depending on configuration), making it ideal for large motors.

- Designed for **3-phase AC applications**, commonly used in industrial machinery, pumps, compressors, and conveyors.

5. **Compatibility with Legacy and Modern Systems**

- Works seamlessly with **Eaton s Cutler-Hammer brand** components, ensuring ease of integration in existing systems.

- Can be retrofitted into older industrial setups while maintaining reliability.

6. **Low Maintenance Requirements**

- Once properly installed and maintained, the MCC requires minimal upkeep, reducing downtime.

- The robust design minimizes wear and tear from environmental factors like dust, moisture (in some IP-rated models), and temperature fluctuations.

7. **Proven Track Record**

- Part of Eaton s legacy product line, which has been trusted in industrial applications for decades.

- Extensive field testing and reliability data support its performance in critical applications.

8. **Safety Features**

- Includes **interlocking mechanisms** to prevent accidental operation, enhancing operator safety.

- Some models feature **emergency stop** and **remote control** capabilities for better process management.

---

### **Cons**

1. **Age and Obsolescence**

- As a **legacy product**, the **9-1945-8** may no longer be in active production, making parts replacement difficult over time.

- Eaton has shifted focus to newer **Power Xpert** and **Eaton MCC** series, which offer advanced features like digital monitoring and energy efficiency.

2. **Lack of Modern Control Features**

- **No built-in digital communication** (e.g., Modbus, Profibus, or Ethernet) for remote monitoring or integration with PLCs.

- Relies on **mechanical or analog signaling**, which can be less precise compared to modern digital systems.

3. **Higher Initial Cost for Advanced Features**

- While the base unit is durable, adding **modern control, monitoring, or energy-saving features** may require additional third-party components, increasing total cost of ownership.

4. **Limited Energy Efficiency Options**

- Unlike newer MCCs, the **9-1945-8** does not incorporate **soft starters, variable frequency drives (VFDs), or energy-efficient overload relays** as standard.

- May require retrofitting for modern efficiency standards.

5. **Maintenance Challenges**

- **Mechanical components** (e.g., relays, contactors) may wear out over time and require **expert servicing**, which can be costly.

- **No self-diagnostic capabilities** troubleshooting often relies on manual inspection, increasing downtime.

6. **Space and Weight Considerations**

- The **heavy steel construction** makes it **bulky and heavy**, requiring significant installation space.

- Not ideal for **space-constrained** applications where modern, compact MCCs (e.g., Eaton s **Power Xpert**) would be preferable.

7. **Limited Software and Automation Integration**

- **No built-in SCADA or IoT compatibility**, making it less suitable for **smart factory** or **predictive maintenance** applications.

- Integration with **PLCs or HMIs** may require additional interfaces, increasing complexity.

8. **Potential for Higher Long-Term Costs**

- While initially durable, **replacement parts for older models** can be **expensive or hard to source** compared to newer Eaton products.

- **Energy inefficiencies** in older starters may lead to higher operational costs over time.

---

### **Conclusion**

The **Cutler-Hammer 9-1945-8 (Eaton 919458) MCC** remains a **reliable, heavy-duty solution** for industrial applications where **mechanical robustness and high current handling** are critical. Its **modular design, superior protection features, and proven longevity** make it a strong choice for **legacy systems or applications where modern digital controls are unnecessary**.

However, its **lack of digital integration, energy efficiency, and potential obsolescence issues** mean it may **not be the best long-term investment** for facilities looking to adopt **smart manufacturing, remote monitoring, or energy-saving technologies**. If the application **does not require advanced controls** and **maintenance is manageable**, this MCC can still be a **cost-effective and dependable option**.

For **new installations or facilities aiming for efficiency and automation**, newer **Eaton Power Xpert MCCs** or **modular control panels** would be a **more future-proof** choice.

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### **Recommendation**

- You are **replacing an older MCC** in a **stable, non-expanding** industrial setup.

- Your application **does not require digital monitoring, energy efficiency, or advanced automation**.

- You have **access to spare parts** and **maintenance expertise** for legacy components.

- The **high initial reliability** justifies the **lack of modern features**.

- You need **digital communication (Modbus, Ethernet, etc.)** for PLC or SCADA integration.

- **Energy efficiency and motor soft-starting** are priorities.

- Your facility is **expanding or modernizing**, and you want **long-term scalability**.

- **Maintenance costs or part availability** are concerns over the next **10 years**.

For **new projects**, consider **Eaton s Power Xpert MCC series** or **other modern modular control panels** that offer **better efficiency, diagnostics, and automation support**. If budget allows, a **hybrid approach** (keeping the 9-1945-8 for core protection while adding a **digital control layer** for monitoring) could extend its usefulness.

Details:

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

part #: 919458 prices

• $28.26-$53.00

specifications automationjack:

• brand: Cutler Hammer
• mpn: 9-1945-8

shipping automationjack:

• service: Standard
• transit: 27-32 Days
• class: Standard
• cost: $12.90
• type: Fixed

payments automationjack:

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

seller automationjack:

• rating: 99.6%
• # reviews: 193526
• city: 1 Millennium Dr, Willingboro, NJ 08046

returns automationjack:

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

offer automationjack:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: March 8, 2026

general automationjack:

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

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