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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
MP340KMM
MP340KMM
Limited Stock
From
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Murray Corporation
40
240
MP340KMST
MP340KMST
Limited Stock
From
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Murray Corporation
40
240
MP340KMST24V
MP340KMST24V
Limited Stock
From
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Murray Corporation
40
240
MP340KMY
MP340KMY
Limited Stock
From
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Murray Corporation
40
240
MP350KHAS
MP350KHAS
Limited Stock
From
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Murray Corporation
50
240
MP350KHF
MP350KHF
Limited Stock
From
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Murray Corporation
50
240
MP350KHM
MP350KHM
Limited Stock
From
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Murray Corporation
50
240
MP350KHST
MP350KHST
Limited Stock
From
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Murray Corporation
50
240
MP350KHST24V
MP350KHST24V
Limited Stock
From
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Murray Corporation
50
240
MP350KHY
MP350KHY
Limited Stock
From
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Murray Corporation
50
240
MP350KMAS
MP350KMAS
Limited Stock
From
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Murray Corporation
50
240
MP350KMF
MP350KMF
Limited Stock
From
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Murray Corporation
50
240
MP350KMM
MP350KMM
Limited Stock
From
Get Price
Murray Corporation
50
240
MP350KMST
MP350KMST
Limited Stock
From
Get Price
Murray Corporation
50
240
MP350KMST24V
MP350KMST24V
Limited Stock
From
Get Price
Murray Corporation
50
240
MP350KMY
MP350KMY
Limited Stock
From
Get Price
Murray Corporation
50
240
MP360KHAS
MP360KHAS
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KHF
MP360KHF
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KHM
MP360KHM
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KHST
MP360KHST
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KHST24V
MP360KHST24V
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KHY
MP360KHY
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KMAS
MP360KMAS
Limited Stock
From
Get Price
Murray Corporation
60
240
MP360KMF
MP360KMF
Limited Stock
From
Get Price
Murray Corporation
60
240
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.