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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
KDC3250T57WZGP
KDC3250T57WZGP
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Cutler Hammer
250
600
KDC3250V
KDC3250V
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From
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Cutler Hammer
250
600
KDC3350V
KDC3350V
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Eaton
350
600
KDC4100
KDC4100
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Westinghouse
100
600
KDC4100W
KDC4100W
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Westinghouse
100
600
KDC4125
KDC4125
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Westinghouse
125
600
KDC4125W
KDC4125W
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From
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Westinghouse
125
600
KDC4150
KDC4150
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Cutler Hammer
150
600
KDC4175
KDC4175
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Westinghouse
175
600
KDC4175W
KDC4175W
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From
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Westinghouse
175
600
KDC4200
KDC4200
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Cutler Hammer
200
600
KDC4200W
KDC4200W
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Eaton
200
600
KDC4225
KDC4225
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Eaton
225
600
KDC4225W
KDC4225W
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From
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Eaton
225
600
KDC4250
KDC4250
Limited Stock
From
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Westinghouse
250
600
KDC4250W
KDC4250W
Limited Stock
From
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Cutler Hammer
250
600
KDC4300
KDC4300
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From
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Westinghouse
300
600
KDC4300W
KDC4300W
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From
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Westinghouse
300
600
KDC4350
KDC4350
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From
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Cutler Hammer
350
600
KDC4350W
KDC4350W
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From
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Cutler Hammer
350
600
KDC4400
KDC4400
Limited Stock
From
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Westinghouse
400
600
KDC4400W
KDC4400W
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From
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Westinghouse
400
600
LD3250T77W
LD3250T77W
Limited Stock
From
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Westinghouse
250
600
LD3300C
LD3300C
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From
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Westinghouse
300
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.