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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
315C574G03
315C574G03
Limited Stock
From
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Eaton
125
500
315C574G05
315C574G05
Limited Stock
From
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Eaton
150
500
315C574G07
315C574G07
Limited Stock
From
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Eaton
175
500
315C574G18
315C574G18
Limited Stock
From
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Eaton
125
500
315C574G20
315C574G20
Limited Stock
From
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Eaton
150
500
315C574G22
315C574G22
Limited Stock
From
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Eaton
175
500
315C574G24
315C574G24
Limited Stock
From
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Eaton
225
500
315C574G26
315C574G26
Limited Stock
From
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Eaton
250
500
452D370G02
452D370G02
Limited Stock
From
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Eaton
250
500
452D390G02
452D390G02
Limited Stock
From
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Eaton
15
500
452D391G16
452D391G16
Limited Stock
From
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Eaton
15
500
452D391G17
452D391G17
Limited Stock
From
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Eaton
15
500
452D391G18
452D391G18
Limited Stock
From
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Eaton
25
500
452D391G19
452D391G19
Limited Stock
From
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Eaton
25
500
452D391G20
452D391G20
Limited Stock
From
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Eaton
50
500
452D391G21
452D391G21
Limited Stock
From
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Eaton
50
500
452D391G22
452D391G22
Limited Stock
From
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Eaton
75
500
452D391G23
452D391G23
Limited Stock
From
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Eaton
75
500
452D391G24
452D391G24
Limited Stock
From
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Eaton
100
500
452D391G25
452D391G25
Limited Stock
From
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Eaton
100
500
452D820G02
452D820G02
Limited Stock
From
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Eaton
250
500
454D507G08
454D507G08
Limited Stock
From
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Eaton
40
125
454D507G09
454D507G09
Limited Stock
From
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Eaton
50
125
454D507G10
454D507G10
Limited Stock
From
Get Price
Eaton
50
125
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.