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Molded Case Circuit Breaker

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Molded Case Circuit Breaker

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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
MD3600W	In Stock From $3,189^.17	Eaton	600	600
MD3700	In Stock From $2,912^.18	Eaton	700	600
MD3700W	In Stock From $2,790^.72	Eaton	700	600
MDL3800A02	In Stock From $5,439^.13	Eaton	800	600
MDLB3300W	In Stock From $1,843^.19	Cutler Hammer	300	600
MDLB3350W	In Stock From $1,300^.79	Eaton	350	600
MDLB3400W	In Stock From $2,080^.08	Westinghouse	400	600
MDLB3450	In Stock From $3,777^.88	Cutler Hammer	450	600
MDLB3450W	In Stock From $1,562^.47	Westinghouse	450	600
MDLB3500W	In Stock From $1,965^.91	Westinghouse	500	600
MDLB3600W	In Stock From $1,971^.22	Westinghouse	600	600
MDLB3700W	In Stock From $1,710^.09	Eaton	700	600
NB21000	In Stock From $525^.94	Westinghouse	1000	600
NB21000PR	In Stock From $4,008^.26	Westinghouse	1000	600
NB21000S	In Stock From $3,606^.59	Westinghouse	1000	600
NB21200F	In Stock From $2,913^.12	Westinghouse	1200	600
NB21200S	In Stock From $6,617^.51	Westinghouse	1200	600
NB21200WK	In Stock From $3,123^.54	Westinghouse	1200	600
NB21200WSK	In Stock From $4,706^.88	Westinghouse	1200	600
NB2700	In Stock From $2,057^.58	Westinghouse	700	600
NB2700PR	In Stock From $3,666^.36	Westinghouse	700	600
NB2700S	In Stock From $3,657^.58	Westinghouse	700	600
NB2800	In Stock From $3,062^.57	Westinghouse	800	600
NB2800PF	In Stock From $3,680^.98	Westinghouse	800	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.