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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
E2K3400MAWS10
E2K3400MAWS10
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Eaton
400
600
E2K3400MAWS11
E2K3400MAWS11
Limited Stock
From
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Cutler Hammer
400
600
E2K3400MAWS12
E2K3400MAWS12
Limited Stock
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Westinghouse
400
600
E2K3400MAWS13
E2K3400MAWS13
Limited Stock
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Westinghouse
400
600
E2K3400MAWS14
E2K3400MAWS14
Limited Stock
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Eaton
400
600
E2K3400MAWS15
E2K3400MAWS15
Limited Stock
From
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Cutler Hammer
400
600
E2K3400MAWS16
E2K3400MAWS16
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Eaton
400
600
E2K3400MAWS17
E2K3400MAWS17
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Westinghouse
400
600
E2K3400MAWS18
E2K3400MAWS18
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Eaton
400
600
E2K3400MAWS19
E2K3400MAWS19
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Cutler Hammer
400
600
E2K3400MAWS20
E2K3400MAWS20
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Eaton
400
600
E2K3400MAWS29
E2K3400MAWS29
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Eaton
400
600
E2K3400MAWS30
E2K3400MAWS30
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Cutler Hammer
400
600
E2K3400MAWS31
E2K3400MAWS31
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Cutler Hammer
400
600
E2K3400MAWS32
E2K3400MAWS32
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Eaton
400
600
E2K3400MAWS33
E2K3400MAWS33
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Eaton
400
600
E2K3400MAWS34
E2K3400MAWS34
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Eaton
400
600
E2K3400MAWS35
E2K3400MAWS35
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Eaton
400
600
E2K3400MAWS36
E2K3400MAWS36
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Westinghouse
400
600
E2K3400MAWS37
E2K3400MAWS37
Limited Stock
From
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Westinghouse
400
600
E2K3400MAWS38
E2K3400MAWS38
Limited Stock
From
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Cutler Hammer
400
600
E2K3400MAWS39
E2K3400MAWS39
Limited Stock
From
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Westinghouse
400
600
E2K3400MAWS40
E2K3400MAWS40
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Westinghouse
400
600
E2K3400MAWS41
E2K3400MAWS41
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Cutler Hammer
400
600
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.