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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
MDN4083LEA0422NMNXNENHMPX
MDN4083LEA0422NMNXNENHMPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHMSX
MDN4083LEA0422NMNXNENHMSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHMWX
MDN4083LEA0422NMNXNENHMWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHNAX
MDN4083LEA0422NMNXNENHNAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHNCX
MDN4083LEA0422NMNXNENHNCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHNPX
MDN4083LEA0422NMNXNENHNPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHNSX
MDN4083LEA0422NMNXNENHNSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENHNWX
MDN4083LEA0422NMNXNENHNWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKCAX
MDN4083LEA0422NMNXNENKCAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKCCX
MDN4083LEA0422NMNXNENKCCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKCPX
MDN4083LEA0422NMNXNENKCPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKCSX
MDN4083LEA0422NMNXNENKCSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKCWX
MDN4083LEA0422NMNXNENKCWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKDAX
MDN4083LEA0422NMNXNENKDAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKDCX
MDN4083LEA0422NMNXNENKDCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKDPX
MDN4083LEA0422NMNXNENKDPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKDSX
MDN4083LEA0422NMNXNENKDSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKDWX
MDN4083LEA0422NMNXNENKDWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKMAX
MDN4083LEA0422NMNXNENKMAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKMCX
MDN4083LEA0422NMNXNENKMCX
Limited Stock
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKMPX
MDN4083LEA0422NMNXNENKMPX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKMSX
MDN4083LEA0422NMNXNENKMSX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKMWX
MDN4083LEA0422NMNXNENKMWX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNENKNAX
MDN4083LEA0422NMNXNENKNAX
Limited Stock
From
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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.