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  3. CUTLER HAMMER D320RAK03B

CUTLER HAMMER D320RAK03B Eaton

D320rak03b Cutler Hammer Eaton Corporation / Used

( Brand: Cutler Hammer ), ( Manufacturer Part Number: D320RAK03B )

Review CUTLER HAMMER Eaton Corporation Used

The **Cutler-Hammer D320RAK03B** is a robust and versatile motor control power center designed for industrial applications requiring reliable, high-performance electrical distribution and protection. Part of Eaton s renowned **Power Xpert** series, this compact yet powerful unit combines advanced circuit protection with modular flexibility, making it an ideal solution for demanding environments such as manufacturing plants, commercial facilities, and industrial automation systems. Engineered with Eaton s cutting-edge **Power Xpert** technology, the D320RAK03B integrates seamless integration with Eaton s **PowerFlex** variable frequency drives (VFDs) and other motor control components, ensuring optimized energy efficiency and reduced downtime. Its **320-ampere** rating provides ample capacity for medium to large motor loads, accommodating a wide range of applications from conveyor systems and pumps to compressors and HVAC equipment. The unit features a **rack-mounted design** with a **front-accessible** configuration, allowing for easy installation, maintenance, and expansion, while its **NEMA 1** enclosure offers standard protection against dust and accidental contact, though it can be upgraded to meet more stringent environmental requirements if necessary.

At the heart of the D320RAK03B is Eaton s **thermal magnetic circuit breaker technology**, which delivers precise overload and short-circuit protection while minimizing false trips and maximizing equipment longevity. The integrated **Power Xpert** platform enables advanced monitoring and diagnostics through Eaton s **PowerLogic** or **Eaton s digital control solutions**, providing real-time data on energy consumption, fault detection, and system health all of which contribute to predictive maintenance and operational efficiency. The unit s **modular design** allows for easy customization, with options for additional **disconnect switches, control relays, or auxiliary contacts** to meet specific application needs. Its **compact footprint** ensures efficient space utilization in control panels, while the **high-quality copper bus bars** and **low-impedance design** enhance current-carrying capacity and reduce voltage drops, ensuring optimal performance under heavy loads.

Safety and reliability are paramount in industrial settings, and the D320RAK03B incorporates multiple layers of protection to safeguard both personnel and equipment. Features such as **arc-resistant design elements**, **ground fault protection**, and **overcurrent trip units** help mitigate the risk of electrical faults, while its **UL and CSA listed** compliance ensures adherence to stringent safety and performance standards. The unit s **easy-to-read labeling** and **clear status indicators** simplify troubleshooting, reducing downtime during maintenance or emergency situations. Additionally, the **D320RAK03B s compatibility with Eaton s broader motor control ecosystem** including **PowerFlex drives, soft starters, and contactors** enables seamless system integration, further enhancing operational flexibility and scalability. Whether deployed in a new installation or as part of a retrofitted control system, this power center delivers a balance of performance, durability, and adaptability, making it a trusted choice for engineers and facility managers seeking dependable electrical distribution solutions.

### **Pros and Cons of buying a Cutler-Hammer D320RAK03B (Eaton) Motor Starter**

The **Cutler-Hammer D320RAK03B** is a **320-ampere AC motor starter** designed for industrial applications, offering reliable protection for electric motors. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **High Current Rating (320 Amps)**

- Suitable for heavy-duty industrial motors, including pumps, compressors, and conveyors.

- Handles high-power applications without overheating under normal loads.

2. **Reliable Thermal Protection**

- Built-in thermal overload relays prevent motor damage from sustained overcurrent conditions.

- Adjustable trip settings allow for customization based on motor specifications.

3. **Durable Construction**

- Made for harsh industrial environments with robust enclosure designs (typically NEMA 1, 3R, or 4X ratings).

- Resistant to dust, moisture, and mechanical stress.

4. **Compatibility with Eaton s Legacy Systems**

- Part of Eaton s Cutler-Hammer line, which is widely used in industrial facilities, ensuring availability of spare parts.

- Works seamlessly with other Eaton components like contactors, relays, and control panels.

5. **Manual & Automatic Control Options**

- Can be configured for **manual push-button control** or **automatic operation** via external control circuits.

- Supports **remote start/stop** functionality for integration into larger control systems.

6. **Long Lifespan & Low Maintenance**

- High-quality contacts and magnetic coils reduce wear and tear over time.

- Minimal moving parts mean fewer failures compared to mechanical starters.

7. **Safety Features**

- **Arc-resistant design** reduces the risk of electrical arcs in enclosed spaces.

- **Overload protection** prevents motor burnout from sustained faults.

8. **Widely Available & Supported**

- Eaton (formerly Cutler-Hammer) has a strong global distribution network, making replacements and repairs easier.

- Technical documentation and support are readily accessible.

---

### **Cons**

1. **Higher Upfront Cost**

- Compared to generic or aftermarket motor starters, Eaton s branded units are more expensive.

- May require a larger initial investment for industrial applications.

2. **Limited Modern Smart Features**

- Lacks **digital monitoring, remote diagnostics, or IoT connectivity** found in newer motor starters (e.g., Eaton s **MOVITRAC** or **MOVITRON** series).

- No built-in **energy efficiency tracking** or **predictive maintenance alerts**.

3. **Potential Compatibility Issues with Newer Systems**

- Some modern PLCs or SCADA systems may require additional interfaces for seamless integration.

- May not support **modbus, Profibus, or Ethernet-based communication** protocols unless retrofitted.

4. **Weight & Space Requirements**

- Bulkier than some modern compact starters, which may be a constraint in space-limited installations.

- Requires proper mounting and ventilation to prevent overheating.

5. **Deprecated Technology in Some Markets**

- While still reliable, some industries are shifting toward **solid-state or soft-start motor controllers** for better efficiency and control.

- May be considered **outdated** compared to newer Eaton or Schneider Electric models.

6. **Maintenance Dependency on Eaton s Support**

- If Eaton s support network weakens in a region, finding replacements or technicians may become difficult.

- Some older models may no longer receive official updates or firmware patches.

7. **No Built-in Energy Saving Features**

- Unlike **soft-start or variable frequency drive (VFD) systems**, this starter does not optimize motor startup for energy efficiency.

- May not be ideal for applications where **reduced inrush current** is critical.

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### **Conclusion**

The **Cutler-Hammer D320RAK03B** remains a **highly reliable, robust, and proven** choice for **heavy-duty industrial motor control**, particularly in applications where **thermal protection, durability, and legacy system compatibility** are priorities. Its **320-amp rating** makes it suitable for large motors, and its **proven track record** ensures long-term performance in demanding environments.

However, if **modern control features, energy efficiency, or smart monitoring** are required, newer alternatives (such as Eaton s **MOVITRAC B** series or **Schneider Electric s Altivar** starters) may be more advantageous despite a higher initial cost.

For **existing industrial setups where this starter is already in use or recommended by maintenance teams**, it remains a **solid, cost-effective solution**. For **new installations requiring advanced features**, a more modern starter may be worth the investment.

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### **Final Recommendation**

- **Buy the D320RAK03B if:**

- You need a **high-reliability, thermally protected motor starter** for **large industrial motors (320A)**.

- Your system is **already integrated with Eaton components**, and compatibility is a priority.

- You operate in an environment where **durability and manual/automatic control** are more important than smart features.

- Budget constraints make newer, more advanced starters impractical.

- **Consider an Alternative if:**

- You require **energy-efficient startup, remote diagnostics, or IoT integration** opt for a **modern soft-starter or VFD-compatible starter**.

- Your facility is **expanding and needs future-proofing** invest in a **Schneider Electric, Siemens, or Eaton s newer MOVITRAC series**.

- Space is limited, and a **compact starter** would be preferable.

For most **legacy industrial applications where reliability is non-negotiable**, the **D320RAK03B remains a strong, well-supported choice**. However, for **new builds or efficiency-driven projects**, evaluating newer technologies may yield better long-term benefits.

Details:

Sells new and surplus product develops channels to purchase such. 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. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

EATON CORPORATION D320RAK03B / USED CORPORATION, D320RAK03B, BASE, I/O RACK, 3POSITION. Part Number D320RAK03B.

part #: d320rak03b price

  • $255.23

specifications sensoindustria:

  • brand: Cutler Hammer
  • mpn: D320rak03b

payments sensoindustria:

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seller sensoindustria:

  • rating: 99.6%
  • # reviews: 2001 14
  • city: 1 Millennium Dr, Willingboro, NJ 08046

returns sensoindustria:

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

general sensoindustria:

  • condition: Used
  • PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules

offer sensoindustria:

  • started: April 18, 2026
  • options: Ship-to-home
  • availability: In Stock
  • quantity: 1
  • sold: 0

shipping sensoindustria:

  • transit: 23-35 Days
  • service: Standard
  • class: Standard
  • type: Fixed
  • cost: $12.90
category: business & industrial > plcs hmis > plc peripheral modules > plc input output modules, sku: 22230759716661813,
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  • Used. Offer #1 priced at $255.23 + $20.69 shipping estimate = $275.92* total. Full Load Amp NA. Manufacturer Part Number .+$20.69 shipping

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