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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
MGA36400YP
MGA36400YP
Limited Stock
From
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Square D
400
600
MGA36450SA
MGA36450SA
Limited Stock
From
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Square D
450
600
MGA36500SA
MGA36500SA
Limited Stock
From
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Square D
500
600
MGA368006
MGA368006
Limited Stock
From
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Square D
800
600
MJA263502
MJA263502
Limited Stock
From
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Square D
350
600
MJA267002
MJA267002
Limited Stock
From
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Square D
700
600
MJA268002
MJA268002
Limited Stock
From
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Square D
800
600
MJA36300SA
MJA36300SA
Limited Stock
From
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Square D
300
600
MJA36350SA
MJA36350SA
Limited Stock
From
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Schneider Electric
350
600
MJA36400SA
MJA36400SA
Limited Stock
From
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Schneider Electric
400
600
MJA36450SA
MJA36450SA
Limited Stock
From
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Schneider Electric
450
600
MJA36600AASA
MJA36600AASA
Limited Stock
From
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Schneider Electric
600
600
MJA36600SA
MJA36600SA
Limited Stock
From
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Schneider Electric
600
600
MJA36700SA
MJA36700SA
Limited Stock
From
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Schneider Electric
700
600
MJA36800SA
MJA36800SA
Limited Stock
From
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Square D
800
600
MJL36700SA
MJL36700SA
Limited Stock
From
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Square D
700
600
PGA36100U41AAA
PGA36100U41AAA
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From
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Square D
1000
600
PGA36100U41AAB
PGA36100U41AAB
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From
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Schneider Electric
1000
600
PGA36100U41AAC
PGA36100U41AAC
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From
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Schneider Electric
1000
600
PGA36100U41ABC
PGA36100U41ABC
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From
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Square D
1000
600
PGA36100U41ABD
PGA36100U41ABD
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From
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Schneider Electric
1000
600
PGA36100U41AE1
PGA36100U41AE1
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From
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Square D
1000
600
PGA36100U41AE1AA
PGA36100U41AE1AA
Limited Stock
From
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Square D
1000
600
PGA36100U41AE1AB
PGA36100U41AE1AB
Limited Stock
From
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Schneider Electric
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.