SKU: 69906479938

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

Sale price$1259.55 Regular price$1399.50
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Description

Eaton Cutler Hammer MDLB3300 300A 3 Poles Molded Case Circuit Breaker – Bolt On – 600VACThe 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 40C with a 3 pole configuration, it supports AC voltages up to 600VAC and DC

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 69906479938

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Stacie S.
New York, US
★★★★★ 5
Comfortable and the perfect fit
Size: 12, Color: (002) Black/Black/Black
My first pair of Under Armour shoes and I have nothing bad to say about them. They fit well and are comfortable. My favorite so far.
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Reviewed in the United States on June 5, 2026
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Carolyn
Port Orchard, US
★★★★★ 4
Size 11 is short.
Size: 11, Color: (110) Summit White/Summit White/Khaki Base
Am in process of returning them. The sole was very comfortable, but the size 11 was short. Arch support was good and appearance was fine. Disappointed that they are short.
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Reviewed in the United States on April 13, 2026
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Roocilla
Natrona Heights, US
★★★★★ 5
I really like these shoes
Size: 9.5, Color: (023) Distant Gray/Bittersweet Pink/Boundless Blue
These shoes are cute with the different colors. The cushioning, for me, is great. I got them for a trip with a lot of walking and my feet, which normally hurt, didn’t ache at all. I feel they are true to size. The quality seems good. Despite all the walking I did, the shoes still look brand new. I am really pleased with this purchase.
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Reviewed in the United States on May 8, 2026
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Viviana Rodriguez
Alexandria, US
★★★★★ 5
I love it
Size: 7, Color: (023) Distant Gray/Bittersweet Pink/Boundless Blue
Everything good, comfortable.
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Reviewed in the United States on June 8, 2026
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Tamiko Smith
Port Orchard, US
★★★★★ 5
Team underarmour
Size: Medium, Color: Steel Medium Heather (035)/Black
Great fit, super comfortable and definitely great in colder seasons, a staple for my fitness lifestyle @tamikonicole #underarmour
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Reviewed in the United States on May 3, 2026

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