SKU: 43656990221

Eaton Cutler Hammer MDLB3400 400A 3 Poles Molded Case Circuit Breaker – Bolt On – 600VAC

Sale price$1349.55 Regular price$1499.50
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Description

Eaton Cutler Hammer MDLB3400 400A 3 Poles Molded Case Circuit Breaker – Bolt On – 600VACThe Eaton Cutler Hammer MDLB3400 molded case circuit breaker is designed to deliver dependable circuit protection for industrial and commercial electrical distribution systems. Featuring the MDLB frame style and a thermal magnetic non interchangeable trip unit, this breaker provides reliable protection against overload and short circuit conditions. With a continuous current rating of 400 amperes at 40C and a 3 pole configuration, it supports AC

The Eaton Cutler-Hammer MDLB3400 molded case circuit breaker is designed to deliver dependable circuit protection for industrial and commercial electrical distribution systems. Featuring the MDLB frame style and a thermal magnetic non-interchangeable trip unit, this breaker provides reliable protection against overload and short-circuit conditions. With a continuous current rating of 400 amperes at 40°C and 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 long-lasting performance in demanding environments.

Product Specifications

  • Brand: Eaton / Cutler-Hammer
  • Model: MDLB3400
  • Breaker Type: Molded Case Circuit Breaker
  • Frame Type: MDLB (M Frame Style)
  • Trip Unit Type: Thermal Magnetic Non-Interchangeable Trip
  • Amperage Rating: 400 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 with fixed protection settings
  • Durable molded case housing for industrial and commercial environments
  • High interrupting capacity for enhanced fault protection
  • Suitable for both AC and limited DC applications
  • Designed for dependable performance in heavy-duty electrical 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 power distribution, panelboard protection, and heavy-duty electrical circuit protection

Important Note

The product image shown represents a base model and is intended for identification purposes only. Accessories ordered with the breaker can be installed to meet your specific configuration requirements at no additional cost. Please include all required configuration details in the order comment box during checkout to ensure accurate 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: 43656990221

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R. S.
Whiting, US
★★★★★ 5
Great wind spinners, you can't go wrong
Size: 8 Inch
5 stars is not enough for these. OMG I found my new supplier for the wind spinners. I have gone through four other suppliers and they did not turn out well, for various reasons. But these I love for a couple of reasons. First I love that they have the paper on them for removing the plastic, holy cow was that easy! Second I love how they turn out for the ones I already made. They sublimate beautifully and the colors really pop. Thanks so much, and I'm going to order more right now! I hope you don't change them. I do recommend these folks, they are awesome.
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Reviewed in the United States on July 26, 2025
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Stephanie
Louisville, US
★★★★★ 5
Amazing!
Size: 8 Inch, Size: 8 Inch
These sublimate beautifully!!! I love that they are individually wrapped - makes it SO much nicer for craft shows! They’re so great to work with. No issues! Just flawless.
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Reviewed in the United States on March 18, 2026
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Douglas
Alexandria, US
★★★★★ 5
High quality
Size: 8 Inch
got these to make some spinners for our football team and found them to be terrific. The image transfer was true to color and the size was perfect. We are going to make a few as gifts for our friends and thought the pressing of the tines out to create the spinner was quite simple. Will definitely be ordering more.
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Reviewed in the United States on October 13, 2025
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KZ
Natrona Heights, US
★★★★★ 4
Good quality
Size: 10 Inch
Good quality. A little too thin but not too much.
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Reviewed in the United States on November 15, 2025
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Cherrie Bohlke
San Leandro, US
★★★★★ 5
Highly recommend
Size: 8 Inch, Size: 8 Inch
Love these they turn out so bright. Love how they come with a protective covering to keep them clean and scratch free. Great price. Size is perfect they look great when shaped. They are very easy to assemble.
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Reviewed in the United States on October 6, 2025

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