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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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Amperage
MDN4083LEA0422NMNXNNNRDPX
MDN4083LEA0422NMNXNNNRDPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRDSX
MDN4083LEA0422NMNXNNNRDSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRDWX
MDN4083LEA0422NMNXNNNRDWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRMAX
MDN4083LEA0422NMNXNNNRMAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRMCX
MDN4083LEA0422NMNXNNNRMCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRMPX
MDN4083LEA0422NMNXNNNRMPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRMSX
MDN4083LEA0422NMNXNNNRMSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRMWX
MDN4083LEA0422NMNXNNNRMWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRNAX
MDN4083LEA0422NMNXNNNRNAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRNCX
MDN4083LEA0422NMNXNNNRNCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRNPX
MDN4083LEA0422NMNXNNNRNPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRNSX
MDN4083LEA0422NMNXNNNRNSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRNWX
MDN4083LEA0422NMNXNNNRNWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYCAX
MDN4083LEA0422NMNXNNNYCAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYCCX
MDN4083LEA0422NMNXNNNYCCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYCPX
MDN4083LEA0422NMNXNNNYCPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYCSX
MDN4083LEA0422NMNXNNNYCSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYCWX
MDN4083LEA0422NMNXNNNYCWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYDAX
MDN4083LEA0422NMNXNNNYDAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYDCX
MDN4083LEA0422NMNXNNNYDCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYDPX
MDN4083LEA0422NMNXNNNYDPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYDSX
MDN4083LEA0422NMNXNNNYDSX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYDWX
MDN4083LEA0422NMNXNNNYDWX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNYMAX
MDN4083LEA0422NMNXNNNYMAX
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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.