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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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Manufacturer
Amperage
Voltage
LLS44400WU44X
LLS44400WU44X
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400
480
LLS44400WU53X
LLS44400WU53X
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400
480
LLS44400WU54X
LLS44400WU54X
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Schneider Electric
400
480
LLS44600WU31X
LLS44600WU31X
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Square D
600
480
LLS44600WU33X
LLS44600WU33X
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Schneider Electric
600
480
LLS44600WU43X
LLS44600WU43X
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Square D
600
480
LLS44600WU44X
LLS44600WU44X
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600
480
LLS44600WU53X
LLS44600WU53X
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Schneider Electric
600
480
LLS44600WU54X
LLS44600WU54X
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Square D
600
480
LRA36000S40X
LRA36000S40X
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400
600
LRA36000S60X
LRA36000S60X
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Schneider Electric
600
600
LRF36000S40X
LRF36000S40X
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Square D
400
600
LRF36000S60X
LRF36000S60X
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Schneider Electric
600
600
LRF36250CU31X
LRF36250CU31X
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Square D
250
600
LRF36250CU33X
LRF36250CU33X
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Square D
250
600
LRF36250U31X
LRF36250U31X
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Square D
250
600
LRF36250U33X
LRF36250U33X
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Square D
250
600
LRF36400CU31X
LRF36400CU31X
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Square D
400
600
LRF36400CU33X
LRF36400CU33X
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Schneider Electric
400
600
LRF36400CU44X
LRF36400CU44X
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Square D
400
600
LRF36400CU53X
LRF36400CU53X
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Schneider Electric
400
600
LRF36400CU54X
LRF36400CU54X
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Schneider Electric
400
600
LRF36400U33X
LRF36400U33X
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Square D
400
600
LRF36400U43X
LRF36400U43X
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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.