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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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QO345E39
QO345E39
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Schneider Electric
QO350EC10
QO350EC10
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Schneider Electric
QO363EC6
QO363EC6
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Schneider Electric
QO4100MN
QO4100MN
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Schneider Electric
QOB3605238
QOB3605238
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Square D
QOE110B03
QOE110B03
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Schneider Electric
QOE116B01
QOE116B01
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Schneider Electric
QOE116B03
QOE116B03
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Schneider Electric
QOE132B01
QOE132B01
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Schneider Electric
QOE132C32
QOE132C32
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$28.37
Schneider Electric
QOH115RCDX30
QOH115RCDX30
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Schneider Electric
QOH120RCDX10
QOH120RCDX10
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Schneider Electric
QOT120
QOT120
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$102.02
Schneider Electric
QOUQ250
QOUQ250
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$51.99
Schneider Electric
QOUR240
QOUR240
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$62.14
Schneider Electric
QUO120
QUO120
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$23.40
Schneider Electric
R9D87820
R9D87820
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Schneider Electric
R9R85291
R9R85291
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Schneider Electric
RCD240/30
RCD240/30
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$78.99
Schneider Electric
RGM631004
RGM631004
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Schneider Electric
RMG-250302
RMG-250302
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$41.64
Schneider Electric
RMG250304
RMG250304
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Schneider Electric
RMG400304
RMG400304
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Schneider Electric
RMG630304
RMG630304
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Schneider Electric
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.