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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
HMCPS007C0S
HMCPS007C0S
Limited Stock
From
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Eaton
7
-
HMCPS007E0C
HMCPS007E0C
Limited Stock
From
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Eaton
7
-
JB2250N
JB2250N
Limited Stock
From
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Westinghouse
250
600
JB2250NW
JB2250NW
Limited Stock
From
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Westinghouse
250
600
JB2250SN
JB2250SN
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Westinghouse
250
600
JB2250SNW
JB2250SNW
Limited Stock
From
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Westinghouse
250
600
KB2250SN
KB2250SN
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From
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Westinghouse
250
600
KB2250SNW
KB2250SNW
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From
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Westinghouse
250
600
KB3250SN
KB3250SN
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Westinghouse
250
600
KB3250SNW
KB3250SNW
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From
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Westinghouse
250
600
LA2600SN
LA2600SN
Limited Stock
From
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Westinghouse
600
600
LA36001021
LA36001021
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Westinghouse
600
600
LG3450W
LG3450W
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Eaton
450
600
LG3500W
LG3500W
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Westinghouse
500
600
LG3500WS01
LG3500WS01
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Eaton
500
600
LG3500WS02
LG3500WS02
Limited Stock
From
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Westinghouse
500
600
LG3500WS03
LG3500WS03
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From
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Westinghouse
500
600
LG3500WS04
LG3500WS04
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From
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Cutler Hammer
500
600
LG3500WS05
LG3500WS05
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From
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Westinghouse
500
600
LG3500WS06
LG3500WS06
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From
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Westinghouse
500
600
LG3500WS07
LG3500WS07
Limited Stock
From
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Cutler Hammer
500
600
LG3500WS08
LG3500WS08
Limited Stock
From
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Cutler Hammer
500
600
LG3500WS09
LG3500WS09
Limited Stock
From
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Westinghouse
500
600
LG3500WS10
LG3500WS10
Limited Stock
From
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Eaton
500
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.