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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
LWC2500
LWC2500
Limited Stock
From
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Eaton
500
690
LWC2630
LWC2630
Limited Stock
From
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Eaton
630
690
LWC2630F
LWC2630F
Limited Stock
From
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Westinghouse
630
690
LWC3315
LWC3315
Limited Stock
From
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Westinghouse
315
690
LWC3600
LWC3600
Limited Stock
From
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Westinghouse
600
690
LWC4400
LWC4400
Limited Stock
From
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Cutler Hammer
400
690
LWC4500
LWC4500
Limited Stock
From
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Cutler Hammer
500
690
MDY2400
MDY2400
Limited Stock
From
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Westinghouse
400
240
MDY2600
MDY2600
Limited Stock
From
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Eaton
600
240
MDY3400
MDY3400
Limited Stock
From
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Westinghouse
400
240
MDY3600
MDY3600
Limited Stock
From
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Cutler Hammer
600
240
NBDC31000MWT
NBDC31000MWT
Limited Stock
From
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Eaton
1000
600
NBDC31200MWT
NBDC31200MWT
Limited Stock
From
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Eaton
1200
600
NBDC3700MWT
NBDC3700MWT
Limited Stock
From
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Eaton
700
600
NBDC3800MWT
NBDC3800MWT
Limited Stock
From
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Eaton
800
600
NBDC3900MWT
NBDC3900MWT
Limited Stock
From
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Eaton
900
600
NG31000S04
NG31000S04
Limited Stock
From
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Cutler Hammer
1000
600
NG31000S05
NG31000S05
Limited Stock
From
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Westinghouse
1000
600
NG31000S06
NG31000S06
Limited Stock
From
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Cutler Hammer
1000
600
NG31000S07
NG31000S07
Limited Stock
From
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Cutler Hammer
1000
600
NG31000S08
NG31000S08
Limited Stock
From
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Cutler Hammer
1000
600
NG31000S09
NG31000S09
Limited Stock
From
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Westinghouse
1000
600
NG31000S10
NG31000S10
Limited Stock
From
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Westinghouse
1000
600
NG31000S11
NG31000S11
Limited Stock
From
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Cutler Hammer
1000
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.