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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
LJA36400U43XSOYQ
LJA36400U43XSOYQ
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Square D
400
600
LJA36400U44XSOYQ
LJA36400U44XSOYQ
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Schneider Electric
400
600
LJA36400U54XSOYQ
LJA36400U54XSOYQ
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Square D
400
600
LJL36250U31XSA
LJL36250U31XSA
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Schneider Electric
250
600
LLA36400U43XEHABSAYH1
LLA36400U43XEHABSAYH1
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Square D
400
600
MGA363006AA
MGA363006AA
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Schneider Electric
300
600
MGA363006AB
MGA363006AB
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Schneider Electric
300
600
MGA363006AC
MGA363006AC
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Schneider Electric
300
600
MGA363006SA
MGA363006SA
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Square D
300
600
MGA363006SC
MGA363006SC
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Schneider Electric
300
600
MGA363006SD
MGA363006SD
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Square D
300
600
MGA363006SH
MGA363006SH
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Square D
300
600
MGA363006SK
MGA363006SK
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Schneider Electric
300
600
MGA363006SL
MGA363006SL
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Schneider Electric
300
600
MGA363006SN
MGA363006SN
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Schneider Electric
300
600
MGA363006UA
MGA363006UA
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Square D
300
600
MGA363006UC
MGA363006UC
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Schneider Electric
300
600
MGA363006UH
MGA363006UH
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Schneider Electric
300
600
MGA363006UK
MGA363006UK
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Square D
300
600
MGA363006UL
MGA363006UL
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Square D
300
600
MGA363006YP
MGA363006YP
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Square D
300
600
MGA36300AA
MGA36300AA
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Square D
300
600
MGA36300AASA
MGA36300AASA
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Square D
300
600
MGA36300AB
MGA36300AB
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Schneider Electric
300
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.