CUTLER HAMMER CN35DN3AB Eaton

( Brand: Cutler Hammer ), ( Manufacturer Part Number: CN35DN3AB )

Review CUTLER HAMMER Eaton Corporation Used

The **Cutler-Hammer CN35DN3AB** from Eaton is a robust, medium-voltage power circuit breaker designed for demanding industrial and commercial applications where reliability, safety, and operational efficiency are paramount. Part of Eaton s extensive line of **Vacuum Circuit Breakers (VCBs)**, this model is engineered to provide superior protection for electrical systems rated up to **38 kV** and **3,000 amperes**, making it ideal for medium-voltage distribution networks in facilities such as manufacturing plants, data centers, commercial buildings, and renewable energy installations. The **CN35DN3AB** incorporates Eaton s advanced **vacuum interrupter technology**, which ensures rapid and clean arc interruption, minimizing contact erosion and extending the breaker s operational lifespan while reducing maintenance requirements. Its **draw-out design** allows for easy installation, testing, and servicing without disrupting the electrical system, enhancing both safety and operational flexibility. The breaker is equipped with a **mechanical trip unit** that provides precise fault detection and tripping capabilities, ensuring rapid response to overcurrents, short circuits, or ground faults to prevent equipment damage and downtime. Additionally, the **CN35DN3AB** features a **modular and compact footprint**, optimizing space utilization in electrical panels while maintaining high performance. Its **digital trip unit compatibility** enables seamless integration with Eaton s **PowerLogic** or third-party SCADA systems, facilitating remote monitoring, diagnostics, and predictive maintenance key features for modern smart grid applications. Built to meet stringent industry standards, including **IEC 62271-100** and **NEMA ICS-6**, this circuit breaker is also designed for harsh environments, offering excellent resistance to moisture, dust, and temperature fluctuations, ensuring consistent performance in demanding conditions. Whether used in primary distribution, motor control, or transformer protection, the **Cutler-Hammer CN35DN3AB** delivers uncompromising protection, efficiency, and durability, making it a cornerstone of reliable medium-voltage electrical infrastructure.

The **Cutler-Hammer CN35DN3AB** (an Eaton brand) is a medium-voltage, air circuit breaker (ACB) designed for industrial and commercial applications. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Cutler-Hammer CN35DN3AB**

1. **Reliability and Durability**

The CN35 series is known for robust construction, with high-quality materials and engineering that ensure long-term performance in demanding environments. Eaton s reputation for industrial-grade components supports its reliability in harsh conditions, such as factories, power plants, or outdoor substations.

2. **Wide Voltage and Current Ratings**

This breaker is suitable for a broad range of applications, typically rated for **4.16 kV to 15 kV** and **current ratings from 600A to 3200A**, depending on the specific model variant. This flexibility allows it to be used in various industrial setups without needing frequent upgrades.

3. **Advanced Protection Features**

- **Overcurrent protection** (thermal and magnetic)

- **Ground fault protection** (optional)

- **Phase imbalance detection**

- **Remote control and monitoring capabilities** (via Eaton s integrated systems)

These features enhance system safety and reduce downtime by quickly isolating faults.

4. **Modular Design**

The breaker is designed for easy installation and maintenance. Its modular components allow for upgrades or replacements without overhauling the entire system. This is particularly useful in retrofitting older installations.

5. **Compatibility with Eaton s E-Series**

The CN35 is part of Eaton s broader **E-Series** platform, which integrates seamlessly with other Eaton products like motor control centers (MCCs), relays, and digital protection systems. This interoperability simplifies system design and reduces integration challenges.

6. **Low Maintenance Requirements**

Eaton s design emphasizes durability with minimal moving parts, reducing the need for frequent inspections or replacements. The air-operated mechanism (if applicable) is generally easier to maintain than oil or vacuum breakers.

7. **Compliance with Standards**

The CN35 meets or exceeds industry standards such as **IEEE C37.04, IEEE C37.06, and NEMA ICS-3**, ensuring compatibility with grid codes and regulatory requirements in North America and other regions.

8. **Energy Efficiency**

Modern versions of the CN35 incorporate energy-efficient designs, reducing operational costs over time. Eaton s focus on reducing arc flash energy and improving contact materials also contributes to lower energy losses.

9. **Warranty and Support**

Eaton offers comprehensive warranties (typically **3 5 years**) and extensive technical support, including training, documentation, and field service. This is valuable for large industrial installations where downtime is costly.

10. **Scalability**

The CN35 can be configured for different applications, from simple branch circuit protection to complex substation applications. Its scalability makes it a versatile choice for growing industrial facilities.

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### **Cons of the Cutler-Hammer CN35DN3AB**

1. **High Initial Cost**

Like most high-quality industrial breakers, the CN35 has a **premium price tag**. The upfront investment may be prohibitive for small businesses or projects with tight budgets. The cost includes not only the breaker itself but also installation, testing, and potential customization.

2. **Complex Installation and Testing**

Medium-voltage breakers require specialized knowledge for proper installation, wiring, and commissioning. Mistakes during installation can lead to **malfunctioning, reduced lifespan, or safety hazards**. This may necessitate hiring certified electricians or Eaton-trained technicians, adding to labor costs.

3. **Space Requirements**

The CN35 is a **large, heavy unit**, especially in higher voltage or current ratings. Installation may require dedicated space in a switchgear or control panel, which could limit flexibility in retrofitting older facilities with limited room.

4. **Dependence on Eaton s Ecosystem**

While the integration with Eaton s products is an advantage, it can also be a drawback if the system relies heavily on proprietary components. Replacement parts or upgrades may be limited to Eaton s offerings, potentially increasing long-term costs if Eaton discontinues certain models.

5. **Arc Flash and Safety Risks**

Medium-voltage breakers inherently pose **arc flash hazards**. The CN35, while designed with safety features, still requires strict adherence to **NFPA 70E** and other safety protocols. Training personnel to handle these risks is essential but adds to operational overhead.

6. **Potential for False Trips**

Some users report instances where the breaker trips unexpectedly due to **transient surges, poor wiring, or sensitive settings**. This can disrupt operations and require troubleshooting. Proper tuning and maintenance are critical to minimizing false trips.

7. **Limited Availability of Spare Parts**

While Eaton has a strong supply chain, some older models or specific variants may have **limited availability of spare parts**, particularly in regions with fewer Eaton distributors. This could lead to delays in repairs or replacements.

8. **Training Requirements**

Operators and maintenance personnel need training to **program, monitor, and troubleshoot** the CN35 effectively. Without proper training, the breaker s advanced features may not be utilized optimally, leading to inefficiencies or safety lapses.

9. **Environmental Considerations**

While air circuit breakers are generally more environmentally friendly than oil-filled breakers, they still require **proper ventilation and dust/particle control** in the installation environment. Poor environmental conditions can accelerate wear and tear.

10. **Longer Lead Times for Custom Orders**

For specialized configurations (e.g., custom trip curves, additional relays), lead times may be longer than standard off-the-shelf products. This can delay project timelines for time-sensitive installations.

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### **Conclusion**

The **Cutler-Hammer CN35DN3AB** is a **high-performance, reliable medium-voltage breaker** suited for industrial applications requiring robust protection, scalability, and integration with Eaton s ecosystem. Its advanced features, durability, and compliance with industry standards make it a strong choice for **large-scale facilities, substations, or critical infrastructure** where uptime and safety are paramount.

However, its **high cost, complex installation requirements, and dependency on Eaton s support network** may present challenges for smaller businesses or projects with limited resources. Additionally, the need for **specialized training and maintenance** ensures that it is not a "plug-and-play" solution but rather requires careful planning and expertise.

For **commercial or industrial applications where reliability and protection are critical**, the CN35DN3AB is a **highly recommended choice**, provided the budget and operational support are in place. For **smaller or cost-sensitive applications**, alternatives such as **lower-voltage breakers, less complex ACBs, or different brands** (e.g., Siemens, GE, or Schneider Electric) may offer a more balanced cost-performance ratio.

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### **Final Recommendation**

- You are investing in a **long-term industrial or substation application** where reliability and advanced protection are non-negotiable.

- Your facility can **justify the upfront cost** and has access to **trained personnel** for installation and maintenance.

- You plan to **integrate with Eaton s broader product line** (e.g., MCCs, relays, or digital protection systems).

- Compliance with **strict industry standards** (e.g., IEEE, NEMA) is a priority.

- Your budget is **constrained**, and a lower-cost breaker (e.g., a **Siemens 3AH, GE MCCB, or Schneider Electric Masterpact**) would suffice.

- Your application is **small-scale or non-critical**, where a simpler breaker (e.g., a **low-voltage MCCB**) would be more practical.

- You lack **in-house expertise** in medium-voltage breakers, as the learning curve and maintenance requirements are significant.

In summary, the CN35DN3AB is a **premium industrial solution** best suited for **high-demand environments** where its strengths outweigh its drawbacks. For less demanding applications, a more cost-effective alternative may be preferable.

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. Part Number CN35DN3AB. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

EATON CORPORATION CN35DN3AB / USED PRICE/EA CONTACTOR, 1NO, 120VAC, 30A, 3P; LOAD CURRENT INDUCTIVE:-; RELAY MOUNTING:-; OPERATING voltage :-; CONTACT CONFIGURATION:1NO; NO. Sells new and surplus product develops channels to purchase such.

part #: cn35dn3ab prices

• $85.49-$288.95

specifications automationjack:

• brand: Cutler Hammer
• mpn: Cn35dn3ab

offer automationjack:

• availability: In Stock
• started: April 7, 2026
• quantity: 1
• sold: 0
• options: Ship-to-home

shipping automationjack:

• type: Fixed
• service: Standard
• cost: $12.90
• transit: 30-35 Days
• class: Standard

seller automationjack:

• # reviews: 1982 27
• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.6%

general automationjack:

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

payments automationjack:

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

returns automationjack:

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

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