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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
MDN4083LEA0422NMNXNNNLDSX
MDN4083LEA0422NMNXNNNLDSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLDWX
MDN4083LEA0422NMNXNNNLDWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLMAX
MDN4083LEA0422NMNXNNNLMAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLMCX
MDN4083LEA0422NMNXNNNLMCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLMPX
MDN4083LEA0422NMNXNNNLMPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLMSX
MDN4083LEA0422NMNXNNNLMSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLMWX
MDN4083LEA0422NMNXNNNLMWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLNAX
MDN4083LEA0422NMNXNNNLNAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLNCX
MDN4083LEA0422NMNXNNNLNCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLNPX
MDN4083LEA0422NMNXNNNLNPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLNSX
MDN4083LEA0422NMNXNNNLNSX
Limited Stock
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNLNWX
MDN4083LEA0422NMNXNNNLNWX
Limited Stock
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNNNAX
MDN4083LEA0422NMNXNNNNNAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNNNCX
MDN4083LEA0422NMNXNNNNNCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNNNPX
MDN4083LEA0422NMNXNNNNNPX
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From
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNNNSX
MDN4083LEA0422NMNXNNNNNSX
Limited Stock
From
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNNNWX
MDN4083LEA0422NMNXNNNNNWX
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From
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRCAX
MDN4083LEA0422NMNXNNNRCAX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRCCX
MDN4083LEA0422NMNXNNNRCCX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRCPX
MDN4083LEA0422NMNXNNNRCPX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRCSX
MDN4083LEA0422NMNXNNNRCSX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRCWX
MDN4083LEA0422NMNXNNNRCWX
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRDAX
MDN4083LEA0422NMNXNNNRDAX
Limited Stock
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Cutler Hammer
800
MDN4083LEA0422NMNXNNNRDCX
MDN4083LEA0422NMNXNNNRDCX
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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.