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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
KA3070A
KA3070A
Limited Stock
From
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Westinghouse
70
600
KA3070SV
KA3070SV
Limited Stock
From
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Westinghouse
70
600
KA3070SWV
KA3070SWV
Limited Stock
From
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Westinghouse
70
600
KA3070V
KA3070V
Limited Stock
From
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Westinghouse
70
600
KA3070WV
KA3070WV
Limited Stock
From
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Westinghouse
70
600
KA3090A
KA3090A
Limited Stock
From
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Westinghouse
90
600
KA3090SV
KA3090SV
Limited Stock
From
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Westinghouse
90
600
KA3090SWV
KA3090SWV
Limited Stock
From
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Westinghouse
90
600
KA3090V
KA3090V
Limited Stock
From
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Westinghouse
90
600
KA3090WV
KA3090WV
Limited Stock
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Westinghouse
90
600
KA3100A
KA3100A
Limited Stock
From
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Westinghouse
100
600
KA3100SV
KA3100SV
Limited Stock
From
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Westinghouse
100
600
KA3100SWV
KA3100SWV
Limited Stock
From
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Westinghouse
100
600
KA3100V
KA3100V
Limited Stock
From
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Westinghouse
100
600
KA3100WV
KA3100WV
Limited Stock
From
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Westinghouse
100
600
KA3125A
KA3125A
Limited Stock
From
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Westinghouse
125
600
KA3125SV
KA3125SV
Limited Stock
From
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Westinghouse
125
600
KA3125SWV
KA3125SWV
Limited Stock
From
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Westinghouse
125
600
KA3125V
KA3125V
Limited Stock
From
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Westinghouse
125
600
KA3125WV
KA3125WV
Limited Stock
From
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Westinghouse
125
600
KA3150A
KA3150A
Limited Stock
From
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Westinghouse
150
600
KA3150SV
KA3150SV
Limited Stock
From
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Westinghouse
150
600
KA3150SWV
KA3150SWV
Limited Stock
From
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Westinghouse
150
600
KA3150V
KA3150V
Limited Stock
From
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Westinghouse
150
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.