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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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Amperage
Voltage
430421
430421
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General Electric
125
690
430460
430460
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General Electric
80
690
430463
430463
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General Electric
100
690
430466
430466
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General Electric
125
690
430498
430498
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General Electric
80
690
430501
430501
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General Electric
100
690
430518
430518
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General Electric
80
690
430521
430521
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General Electric
100
690
430524
430524
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General Electric
125
690
430537
430537
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General Electric
80
690
430540
430540
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General Electric
100
690
430557
430557
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General Electric
80
690
430560
430560
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General Electric
100
690
430563
430563
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General Electric
125
690
430591
430591
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General Electric
80
690
430594
430594
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General Electric
100
690
430597
430597
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General Electric
125
690
430630
430630
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General Electric
80
690
430633
430633
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General Electric
100
690
430649
430649
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General Electric
80
690
430652
430652
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General Electric
100
690
430655
430655
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General Electric
125
690
430668
430668
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General Electric
80
690
430671
430671
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General Electric
100
690
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.