Eaton Cutler Hammer E2M3800MWWU66 800A 3 Pole Molded Case Mining Circuit Breaker – Bolt On – 600VAC

The Eaton Cutler Hammer E2M3800MWWU66 is a heavy-duty molded case mining circuit breaker engineered for demanding industrial and mining power distribution systems. Rated at 800 amps with a 3-pole configuration, it uses an interchangeable magnetic-only trip unit designed for instantaneous short-circuit protection, typically in systems where overload protection is handled separately. The integrated U66 option adds a 120 VAC undervoltage release with LED indicator, improving system safety by automatically tripping the breaker under low-voltage conditions. Its rugged molded case construction and bolt-on mounting ensure reliable operation in harsh environments up to 600VAC.

Product Specifications

• Brand: Eaton / Cutler Hammer
• Model Number: E2M3800MWWU66
• 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 Option
• Standard Lug Type: Without Terminals Standard

Technical Specifications

• Magnetic-only trip unit for instantaneous short-circuit protection
• Requires external overload protection depending on 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: 3000 – 6000
• U66 Option Includes: 120 VAC Undervoltage Release (UVR)
• U66 Includes LED Indicator
• U66 Mounting Position: Left Pole Mounted
• U66 Wiring Exit: Rear
• Suitable for feeder and heavy-duty distribution applications

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 Power Distribution, Motor Circuits, Heavy-Duty Feeders, Critical Protection Systems
• 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 depending on application design. Always verify coordination requirements, voltage rating, accessory configuration, and installation suitability before purchase or use.

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You may return items within 30 days of delivery for a refund.

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