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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
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NFJ431125
NFJ431125
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Federal Pacific
NFJ631020R
NFJ631020R
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Federal Pacific
NFJ631225RNA
NFJ631225RNA
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Federal Pacific
NFS631070
NFS631070
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$11.11
Federal Pacific
NJJ631400
NJJ631400
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$55.56
Federal Pacific
NJL43250
NJL43250
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$0.04
Federal Pacific
NJN56400E20
NJN56400E20
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$118.56
Federal Pacific
PK203
PK203
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$22.22
Federal Pacific
YW52166
YW52166
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Federal Pacific
NEJ222200
NEJ222200
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Federal Pacific
HEF631030MSMTO
HEF631030MSMTO
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Federal Pacific
HEJ23200
HEJ23200
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Federal Pacific
HEJ232225
HEJ232225
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Federal Pacific
HF631150
HF631150
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Federal Pacific
HJL632090
HJL632090
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Federal Pacific
HM632800F
HM632800F
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Federal Pacific
HNB120
HNB120
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Federal Pacific
NBH2100
NBH2100
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Federal Pacific
NEF435070SE3
NEF435070SE3
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Federal Pacific
NEJ222225
NEJ222225
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Federal Pacific
NF622070
NF622070
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Federal Pacific
NJL621300
NJL621300
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Federal Pacific
NJLS631250
NJLS631250
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Federal Pacific
NKL63F000
NKL63F000
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Federal Pacific
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.