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Molded Case Circuit Breaker

For circuit breaker systems in commercial and industrial facilities, molded case circuit breakers are among the most widely used components for reliable overcurrent protection and electrical distribution. Molded case circuit breakers provide automatic circuit interruption during overload or short circuit conditions, protecting electrical systems and equipment from damage while enabling manual switching control. Electrical.com carries an extensive selection of molded 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, manufacturing facilities, data centers, and industrial power distribution applications.
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Part Number
PRICE
Manufacturer
Amperage
Voltage
KG3400WS41
KG3400WS41
Limited Stock
From
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Westinghouse
400
600
KG3400WS43
KG3400WS43
Limited Stock
From
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Eaton
400
600
KG3400WS44
KG3400WS44
Limited Stock
From
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Westinghouse
400
600
KG3400WS45
KG3400WS45
Limited Stock
From
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Westinghouse
400
600
KG3400WS46
KG3400WS46
Limited Stock
From
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Cutler Hammer
400
600
KG3400WS47
KG3400WS47
Limited Stock
From
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Westinghouse
400
600
KG3400WS48
KG3400WS48
Limited Stock
From
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Eaton
400
600
KG3400WS49
KG3400WS49
Limited Stock
From
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Westinghouse
400
600
KG3400WS50
KG3400WS50
Limited Stock
From
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Westinghouse
400
600
KG3400WS51
KG3400WS51
Limited Stock
From
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Cutler Hammer
400
600
KG3400WS52
KG3400WS52
Limited Stock
From
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Cutler Hammer
400
600
KW2200
KW2200
Limited Stock
From
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Eaton
200
690
KW2250
KW2250
Limited Stock
From
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Cutler Hammer
250
690
KW2315
KW2315
Limited Stock
From
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Eaton
315
690
KW2400
KW2400
Limited Stock
From
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Westinghouse
400
690
KW2400KW
KW2400KW
Limited Stock
From
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Westinghouse
400
690
KW4250
KW4250
Limited Stock
From
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Eaton
250
690
KWC2200
KWC2200
Limited Stock
From
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Cutler Hammer
200
690
KWC2250
KWC2250
Limited Stock
From
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Westinghouse
250
690
KWC2315
KWC2315
Limited Stock
From
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Cutler Hammer
315
690
KWC2400
KWC2400
Limited Stock
From
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Westinghouse
400
690
KWC2400F
KWC2400F
Limited Stock
From
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Eaton
400
690
KWC3250
KWC3250
Limited Stock
From
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Cutler Hammer
250
690
KWC4200
KWC4200
Limited Stock
From
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Eaton
200
690
Popular Molded Case Circuit Breaker Manufacturers

Electrical.com stocks the largest inventory of molded case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified MCCBs available for immediate shipment. From standard thermal-magnetic breakers to electronic trip units across all amperage ratings, we have what you need when others say no. Our comprehensive molded case circuit breaker inventory spans all voltage and current ratings, frame sizes, and interrupting capacities 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 molded case circuit breakers serve critical applications across commercial buildings, industrial facilities, manufacturing plants, data centers, healthcare facilities, distribution panels, motor control centers, switchboards, and power distribution systems.


Whether you're maintaining legacy equipment with obsolete MCCB models or sourcing current production breakers for new installations and retrofits, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need molded 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.