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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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5TL1691-0
5TL1691-0
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Siemens
61319
61319
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Merlin Gerin
62-223-1
62-223-1
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Heinemann
657D791G18
657D791G18
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Westinghouse
7-1423675-6
7-1423675-6
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TE Connectivity
7149-BSS
7149-BSS
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Sperry Instruments
76170-1026
76170-1026
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Molex
7940102573
7940102573
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Weidmuller
7940102580
7940102580
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Weidmuller
7940102609
7940102609
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Weidmuller
7940102618
7940102618
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Weidmuller
7940102666
7940102666
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Weidmuller
7940102674
7940102674
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Weidmuller
7940115293
7940115293
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Weidmuller
815001C
815001C
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Littelfuse
8151.25C
8151.25C
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Littelfuse
8340-F130-K4M2-ALH0-3A
8340-F130-K4M2-ALH0-3A
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Eta Engineering Technology
83432
83432
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Miller
8345-B01Z-V3K1-DB1B2B-10A
8345-B01Z-V3K1-DB1B2B-10A
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Eta Engineering Technology
8345-B02A-V3M1-DB1B1B-125A
8345-B02A-V3M1-DB1B1B-125A
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Eta Engineering Technology
8998SBA100
8998SBA100
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Schneider Electric
9080GCB-100
9080GCB-100
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Square D
9510-G213-J3F1-B2C2B9
9510-G213-J3F1-B2C2B9
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Eta Engineering Technology
9510-G213-W4F1-Z0C2B1-5A
9510-G213-W4F1-Z0C2B1-5A
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Eta Engineering Technology
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.