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Insulated Case Circuit Breaker

For circuit breaker applications in commercial and industrial power distribution systems, insulated case circuit breakers are among the most critical components for reliable overcurrent protection and system safety. Insulated case circuit breakers provide adjustable trip settings and high interrupting capacity while offering compact installation in panelboards and switchboards. Electrical.com carries an extensive selection of insulated case circuit breakers from all major manufacturers, including new, used, surplus, and re-certified options. These components are designed to meet the diverse needs of commercial buildings, industrial facilities, data centers, and healthcare infrastructure applications.
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Manufacturer
Amperage
MDN4083LEA0122NMNRNNNYCPX
MDN4083LEA0122NMNRNNNYCPX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYCSX
MDN4083LEA0122NMNRNNNYCSX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYCWX
MDN4083LEA0122NMNRNNNYCWX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYDAX
MDN4083LEA0122NMNRNNNYDAX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYDCX
MDN4083LEA0122NMNRNNNYDCX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYDPX
MDN4083LEA0122NMNRNNNYDPX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYDSX
MDN4083LEA0122NMNRNNNYDSX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYDWX
MDN4083LEA0122NMNRNNNYDWX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYMAX
MDN4083LEA0122NMNRNNNYMAX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYMCX
MDN4083LEA0122NMNRNNNYMCX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYMPX
MDN4083LEA0122NMNRNNNYMPX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYMSX
MDN4083LEA0122NMNRNNNYMSX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYMWX
MDN4083LEA0122NMNRNNNYMWX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYNAX
MDN4083LEA0122NMNRNNNYNAX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYNCX
MDN4083LEA0122NMNRNNNYNCX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYNPX
MDN4083LEA0122NMNRNNNYNPX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYNSX
MDN4083LEA0122NMNRNNNYNSX
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Cutler Hammer
800
MDN4083LEA0122NMNRNNNYNWX
MDN4083LEA0122NMNRNNNYNWX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNCAX
MDN4083LEA0122NMNRNYCNCAX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNCCX
MDN4083LEA0122NMNRNYCNCCX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNCPX
MDN4083LEA0122NMNRNYCNCPX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNCSX
MDN4083LEA0122NMNRNYCNCSX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNCWX
MDN4083LEA0122NMNRNYCNCWX
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Cutler Hammer
800
MDN4083LEA0122NMNRNYCNDAX
MDN4083LEA0122NMNRNYCNDAX
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Cutler Hammer
800

Electrical.com stocks the largest inventory of insulated case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified circuit breakers available for immediate shipment. From low voltage to medium voltage applications, we have the insulated case breakers you need when others say no. Our comprehensive insulated case circuit breaker inventory spans all amperage ratings, voltage classes, and frame sizes from all major manufacturers including current production and discontinued models from legacy suppliers. Available in new factory condition, surplus stock, and re-certified options‚ All backed by our standard 2-year Electrical.com warranty. Our insulated case circuit breakers serve critical applications across industrial power distribution systems, manufacturing facilities, commercial buildings, data centers, utility substations, process control installations, and heavy industrial equipment.


Whether you're maintaining legacy electrical systems with obsolete insulated case breaker models or sourcing current production breakers for new installations and upgrades, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need insulated case circuit breakers now? Call 877-999-7077 or email [email protected]. With same-day shipping available and the right parts ready to ship from our nearest warehouse location, Electrical.com gets your operations back online fast. We can say yes when others have to say no.