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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
FB4015
FB4015
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Westinghouse
15
600
FB4020
FB4020
Limited Stock
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Westinghouse
20
600
FB4020L
FB4020L
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Westinghouse
20
600
FB4025
FB4025
Limited Stock
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Westinghouse
25
600
FB4025L
FB4025L
Limited Stock
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Cutler Hammer
25
600
FB4030
FB4030
Limited Stock
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Cutler Hammer
30
600
FB4030L
FB4030L
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Cutler Hammer
30
600
FB4035
FB4035
Limited Stock
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Westinghouse
35
600
FB4035L
FB4035L
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Cutler Hammer
35
600
FB4040
FB4040
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Westinghouse
40
600
FB4040L
FB4040L
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Cutler Hammer
40
600
FB4045
FB4045
Limited Stock
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Westinghouse
45
600
FB4045L
FB4045L
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Westinghouse
45
600
FB4050L
FB4050L
Limited Stock
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Westinghouse
50
600
FB4060L
FB4060L
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Westinghouse
60
600
FB4070
FB4070
Limited Stock
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Westinghouse
70
600
FB4070L
FB4070L
Limited Stock
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Westinghouse
70
600
FB4080
FB4080
Limited Stock
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Westinghouse
80
600
FB4080L
FB4080L
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Westinghouse
80
600
FB4090
FB4090
Limited Stock
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Westinghouse
90
600
FB4090L
FB4090L
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Westinghouse
90
600
FB4100
FB4100
Limited Stock
From
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Westinghouse
100
600
FB4100L
FB4100L
Limited Stock
From
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Westinghouse
100
600
FB4100N
FB4100N
Limited Stock
From
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Westinghouse
100
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.