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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
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Amperage
MDN4083LEA0422NMNXNEMNCAX
MDN4083LEA0422NMNXNEMNCAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNCCX
MDN4083LEA0422NMNXNEMNCCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNCPX
MDN4083LEA0422NMNXNEMNCPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNCSX
MDN4083LEA0422NMNXNEMNCSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNCWX
MDN4083LEA0422NMNXNEMNCWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNDAX
MDN4083LEA0422NMNXNEMNDAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNDCX
MDN4083LEA0422NMNXNEMNDCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNDPX
MDN4083LEA0422NMNXNEMNDPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNDSX
MDN4083LEA0422NMNXNEMNDSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNDWX
MDN4083LEA0422NMNXNEMNDWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNMAX
MDN4083LEA0422NMNXNEMNMAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNMCX
MDN4083LEA0422NMNXNEMNMCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNMPX
MDN4083LEA0422NMNXNEMNMPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNMSX
MDN4083LEA0422NMNXNEMNMSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNMWX
MDN4083LEA0422NMNXNEMNMWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNNAX
MDN4083LEA0422NMNXNEMNNAX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNNCX
MDN4083LEA0422NMNXNEMNNCX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNNPX
MDN4083LEA0422NMNXNEMNNPX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNNSX
MDN4083LEA0422NMNXNEMNNSX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNEMNNWX
MDN4083LEA0422NMNXNEMNNWX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNENACAX
MDN4083LEA0422NMNXNENACAX
Limited Stock
From
Get Price
Cutler Hammer
800
MDN4083LEA0422NMNXNENACCX
MDN4083LEA0422NMNXNENACCX
Limited Stock
From
Get Price
Cutler Hammer
800
MDN4083LEA0422NMNXNENACPX
MDN4083LEA0422NMNXNENACPX
Limited Stock
From
Get Price
Cutler Hammer
800
MDN4083LEA0422NMNXNENACSX
MDN4083LEA0422NMNXNENACSX
Limited Stock
From
Get Price
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.