Eaton Cutler Hammer MDLB3300 300A 3 Poles Molded Case Circuit Breaker – Bolt On – 600VAC

The Eaton Cutler-Hammer MDLB3300 molded case circuit breaker is designed to deliver reliable protection for industrial and commercial electrical distribution systems. Featuring the MDLB frame style and a thermal magnetic non-interchangeable trip unit, this breaker provides dependable protection against overload and short-circuit conditions. Rated at 300 amperes at 40°C with a 3-pole configuration, it supports AC voltages up to 600VAC and DC applications up to 250VDC. Its bolt-on mounting design ensures secure installation in compatible panelboards and switchgear, while the durable molded case construction ensures consistent performance in demanding environments.

Product Specifications

• Brand: Eaton / Cutler-Hammer
• Model: MDLB3300
• Breaker Type: Molded Case Circuit Breaker
• Frame Type: MDLB (M Frame Style)
• Trip Unit Type: Thermal Magnetic Non-Interchangeable Trip
• Amperage Rating: 300 Ampere
• Number of Poles: 3 Pole
• Mounting Type: Bolt-On
• Frequency: 50/60 Hz
• Standard Lug Type: Not Included / Configurable

Technical Specifications

• Thermal magnetic trip mechanism for accurate overload and short-circuit protection
• Non-interchangeable trip unit for fixed protection settings
• Heavy-duty molded case construction for long service life
• Designed for both AC and limited DC power applications
• High interrupting capacity for reliable fault protection
• Suitable for industrial and commercial power distribution systems

Voltage and Ratings

• Maximum AC Voltage: 600 VAC
• Maximum DC Voltage: 250 VDC
• Interrupting Capacity:
  • • 65 kA @ 240 VAC
    • 50 kA @ 480 VAC
    • 25 kA @ 600 VAC
    • 22 kA @ 250 VDC
• Trip Setting: 5–10 times the continuous ampere rating

Product Data

• Manufacturer: Eaton / Cutler-Hammer
• Product Series: MDLB Frame Series
• Configuration: Molded Case Circuit Breaker
• Connection Type: Bolt-On
• Warranty: 1 Year
• Application: Industrial electrical distribution, panelboard protection, and heavy-duty circuit protection

Important Note

The product image shown represents a base model and is provided for identification purposes only. If accessories are purchased together with the breaker, they can be installed to meet your required configuration at no additional cost. Please include the necessary configuration details in the order comment box during checkout to ensure proper assembly and delivery.

Returns are easy

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

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