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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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PRICE
Manufacturer
Amperage
MDN4083LEA0422NMNRNNNRNCX
MDN4083LEA0422NMNRNNNRNCX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNRNPX
MDN4083LEA0422NMNRNNNRNPX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNRNSX
MDN4083LEA0422NMNRNNNRNSX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNRNWX
MDN4083LEA0422NMNRNNNRNWX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYCAX
MDN4083LEA0422NMNRNNNYCAX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYCCX
MDN4083LEA0422NMNRNNNYCCX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYCPX
MDN4083LEA0422NMNRNNNYCPX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYCSX
MDN4083LEA0422NMNRNNNYCSX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYCWX
MDN4083LEA0422NMNRNNNYCWX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYDAX
MDN4083LEA0422NMNRNNNYDAX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYDCX
MDN4083LEA0422NMNRNNNYDCX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYDPX
MDN4083LEA0422NMNRNNNYDPX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYDSX
MDN4083LEA0422NMNRNNNYDSX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYDWX
MDN4083LEA0422NMNRNNNYDWX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYMAX
MDN4083LEA0422NMNRNNNYMAX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYMCX
MDN4083LEA0422NMNRNNNYMCX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYMPX
MDN4083LEA0422NMNRNNNYMPX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYMSX
MDN4083LEA0422NMNRNNNYMSX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYMWX
MDN4083LEA0422NMNRNNNYMWX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYNAX
MDN4083LEA0422NMNRNNNYNAX
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYNCX
MDN4083LEA0422NMNRNNNYNCX
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From
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYNPX
MDN4083LEA0422NMNRNNNYNPX
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From
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYNSX
MDN4083LEA0422NMNRNNNYNSX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNRNNNYNWX
MDN4083LEA0422NMNRNNNYNWX
Limited Stock
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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.