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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
LJF46250CU31X
LJF46250CU31X
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Square D
250
600
LJF46400CU31X
LJF46400CU31X
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Schneider Electric
400
600
LJL34400WU43X
LJL34400WU43X
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Schneider Electric
400
480
LJL36250
LJL36250
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Square D
250
600
LJL36250CU31X
LJL36250CU31X
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Square D
250
600
LJL36400
LJL36400
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Square D
400
600
LJL36400CU44X
LJL36400CU44X
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Square D
400
600
LJL36400M37X
LJL36400M37X
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Schneider Electric
400
600
LJL36400M38X
LJL36400M38X
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Square D
400
600
LJL36400U53X
LJL36400U53X
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Schneider Electric
400
600
LJL36600
LJL36600
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Square D
600
600
LJL36600M38X
LJL36600M38X
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Schneider Electric
600
600
LJL46250U31X
LJL46250U31X
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Square D
250
600
LJL46250U33X
LJL46250U33X
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Schneider Electric
250
600
LJL46400CU31X
LJL46400CU31X
Limited Stock
From
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Schneider Electric
400
600
LJL46400U31X
LJL46400U31X
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From
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Schneider Electric
400
600
LJL46400U33X
LJL46400U33X
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Square D
400
600
LJL46600U33X
LJL46600U33X
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Schneider Electric
600
600
LJM36250
LJM36250
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Square D
250
600
LJM36400CU44X
LJM36400CU44X
Limited Stock
From
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Schneider Electric
400
600
LJM36400CU53X
LJM36400CU53X
Limited Stock
From
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Schneider Electric
400
600
LJM36400U33X
LJM36400U33X
Limited Stock
From
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Schneider Electric
400
600
LJP36400CU31X
LJP36400CU31X
Limited Stock
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Schneider Electric
400
600
LJP36400CU33X
LJP36400CU33X
Limited Stock
From
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Square D
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.