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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
KDCM3400J5MW
KDCM3400J5MW
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Westinghouse
400
1000
KDCM3400J5MWA06
KDCM3400J5MWA06
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Eaton
400
1000
KDCM3400K5MW
KDCM3400K5MW
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Cutler Hammer
400
1000
KDCM3400K5MWS10
KDCM3400K5MWS10
Limited Stock
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Westinghouse
400
1000
KDCM3400L5MW
KDCM3400L5MW
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Westinghouse
400
1000
KDCM3400L5MWS10
KDCM3400L5MWS10
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From
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Westinghouse
400
1000
KDCM3400MW
KDCM3400MW
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Cutler Hammer
400
1000
KDCM3400N5MW
KDCM3400N5MW
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Eaton
400
1000
KDCM3400W
KDCM3400W
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Cutler Hammer
400
1000
KDCM3400W5MW
KDCM3400W5MW
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Cutler Hammer
400
1000
KDM2400G5MW
KDM2400G5MW
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From
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Westinghouse
400
600
KDM2400W5MW
KDM2400W5MW
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From
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Cutler Hammer
400
600
KDM2400W5MWS10
KDM2400W5MWS10
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From
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Eaton
400
600
KDM3100W
KDM3100W
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From
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Cutler Hammer
100
600
KDM3125W
KDM3125W
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Cutler Hammer
125
600
KDM3150WA06
KDM3150WA06
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Eaton
150
600
KDM3175W
KDM3175W
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Westinghouse
175
600
KDM3200W
KDM3200W
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Westinghouse
200
600
KDM3225A5W
KDM3225A5W
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Westinghouse
225
600
KDM3225D5MW
KDM3225D5MW
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Cutler Hammer
400
600
KDM3225D5W
KDM3225D5W
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From
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Westinghouse
225
600
KDM3225F
KDM3225F
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From
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Westinghouse
400
600
KDM3225W
KDM3225W
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From
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Eaton
225
600
KDM3225WK37
KDM3225WK37
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Cutler Hammer
225
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.