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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
QO120EB6
QO120EB6
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Schneider Electric
QO3100S
QO3100S
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Schneider Electric
QO315EPD5237
QO315EPD5237
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Schneider Electric
QO340EC10
QO340EC10
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Schneider Electric
QO350VSC10
QO350VSC10
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Schneider Electric
QP390
QP390
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Siemens
QY18U204B0
QY18U204B0
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Shamrock
QZ-1-18-D-3-10A
QZ-1-18-D-3-10A
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CBI
R21-61-20.0A-B161IV-V
R21-61-20.0A-B161IV-V
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Sensata Technologies
R58-2A
R58-2A
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NTE
RC221-T14
RC221-T14
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ABB
RCBO-B16/30
RCBO-B16/30
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Lewden
RE1020B
RE1020B
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Westinghouse
REF3-B070
REF3-B070
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Miami Breaker
RHE3-M020
RHE3-M020
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Miami Breaker
RHE3-M050
RHE3-M050
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Miami Breaker
RHF-422N
RHF-422N
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Westinghouse
RS-9991
RS-9991
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Schneider Electric
RS/363/S030
RS/363/S030
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Crabtree
RS/60C/10
RS/60C/10
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Crabtree
RSRLYB00
RSRLYB00
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Red Lion Controls
RTECX6-2C16-030
RTECX6-2C16-030
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Techna
S-282-UC-K6A
S-282-UC-K6A
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ABB
S-N12AC200V
S-N12AC200V
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Mitsubishi
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.