Eaton Cutler Hammer MDLB3800T32W 800A 3 Poles Molded Case Circuit Breaker – Bolt On – 600VAC

The Eaton Cutler-Hammer MDLB3800T32W molded case circuit breaker is a high-performance protection device designed for demanding industrial and commercial electrical distribution systems. Built with the MDLB frame style and featuring an advanced LSI (Long-Time, Short-Time, Instantaneous) non-interchangeable trip unit, this breaker provides precise and adjustable protection against overloads and short-circuit conditions. Rated for a maximum of 800 amperes at 40°C with a 3-pole configuration, it supports operation up to 600VAC at 50/60Hz and is suitable for reverse feed applications. Its bolt-on mounting design ensures secure installation in panelboards and switchgear, making it ideal for heavy-duty power distribution systems where adjustable protection and reliability are critical.

Product Specifications

• Brand: Eaton / Cutler-Hammer
• Model: MDLB3800T32W
• Breaker Type: Molded Case Circuit Breaker
• Frame Type: MDLB (M Frame Style)
• Trip Unit Type: LSI Non-Interchangeable Trip Unit
• Maximum Amperage Rating: 800 Ampere
• Number of Poles: 3 Pole
• Mounting Type: Bolt-On
• Frequency: 50/60 Hz
• Reverse Feed Capability: Suitable for Reverse Feed Applications
• Standard Lug Type: Not Included / Configurable

Technical Specifications

• LSI trip unit providing Long Delay, Short Delay, and Instantaneous protection
• Adjustable long delay pickup controlled by an adjustable rating plug
• Adjustable short delay pickup with I²t response or flat response time characteristics
• Instantaneous protection achieved by setting short-time delay to instantaneous
• Designed for heavy-duty industrial power distribution systems
• Durable molded case construction for long service life and reliability

Voltage and Ratings

• Maximum AC Voltage: 600 VAC
• Interrupting Capacity:
• • 65 kA @ 240 VAC
  • 50 kA @ 480 VAC
  • 25 kA @ 600 VAC
• Trip Setting: Adjustable 5–10 times the continuous ampere rating
• Maximum Continuous Current: 800A at 40°C

Product Data

• Manufacturer: Eaton / Cutler-Hammer
• Product Series: MDLB Frame Series
• Configuration: Molded Case Circuit Breaker with LSI Trip Unit
• Connection Type: Bolt-On
• Warranty: 1 Year
• Application: Industrial power distribution, switchgear systems, and critical electrical protection requiring adjustable trip settings

Important Note

This breaker requires a rating plug in order to function, and the rating plug is not included with the unit. Please contact us to confirm availability and pricing if you require a rating plug installed prior to ordering. The product image represents a base model and is provided for identification purposes only. Accessories purchased with the breaker can be installed at no additional cost—simply include your configuration requirements in the order comments during checkout.

Returns are easy

You may return items within 10 days of delivery for a refund.

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