Eaton Cutler Hammer E2M3800MNWU66 800A 3 Pole Molded Case Mining Circuit Breaker – Bolt On – 600VAC

The Eaton Cutler Hammer E2M3800MNWU66 is a heavy-duty molded case mining circuit breaker designed for industrial and mining power distribution systems requiring reliable protection and control. Rated at 800 amps with a 3-pole configuration, it features an interchangeable magnetic-only trip unit that provides instantaneous short-circuit protection, typically used in systems where external overload protection is implemented separately. The integrated U66 option adds a 120 VAC undervoltage release with LED indication, enhancing system safety by automatically tripping the breaker during low-voltage conditions. Built with a rugged molded case and bolt-on mounting design, this breaker is suitable for demanding environments up to 600VAC.

Product Specifications

• Brand: Eaton / Cutler Hammer
• Model Number: E2M3800MNWU66
• Amperage: 800 Amp
• Number of Poles: 3 Pole
• Breaker Type: Molded Case Mining Circuit Breaker
• Mount Type: Bolt On
• Frame Style: E2M / M Frame
• Trip Unit Type: Interchangeable Magnetic Only
• Frequency: 50/60 Hz
• Configuration: U66 Factory Installed Option
• Standard Lug Type: Without Terminals Standard

Technical Specifications

• Magnetic-only trip unit for instantaneous short-circuit protection
• Requires external overload protection in application design
• Heavy-duty molded case construction for mining and industrial environments
• Bolt-on mounting for secure installation
• Operating temperature rating: 40°C
• Trip Setting Range: 1500 – 3000
• U66 Option Includes: 120 VAC Undervoltage Release (UVR)
• U66 Includes LED Indicator
• U66 Mounting Position: Left Pole Mounted
• U66 Wiring Exit: Rear

Voltage and Ratings

• Maximum Voltage: 600 VAC
• Rated Current: 800 Amp
• Interrupting Capacity: 65 kA @ 240VAC
• Interrupting Capacity: 35 / 50 kA @ 480VAC
• Interrupting Capacity: 25 kA @ 600VAC
• Interrupting Capacity: 22 kA @ 250VDC
• Frequency Rating: 50/60 Hz
• UVR Control Voltage: 120 VAC

Product Data

• Condition: New / Surplus / Reconditioned (subject to availability)
• Warranty: 1 Year
• Product Category: Industrial Circuit Breaker
• Suitable Applications: Mining Systems, Industrial Distribution Panels, Motor Protection Circuits, Heavy-Duty Feeders
• Manufacturer Series: Eaton E2M Series
• Connection Type: Bolt On
• Installed Accessories: Undervoltage Release with LED (U66 Option)
• Lug Type: Without Terminals Standard

Important Note

Product image may represent a standard base model and is for identification purposes only. This unit includes the factory-installed U66 undervoltage release option and uses a magnetic-only trip system requiring external overload protection. Always verify coordination requirements, system voltage, accessory compatibility, and installation conditions before purchase or use.