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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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Manufacturer
Amperage
Voltage
QOUF1301042
QOUF1301042
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30
120
QOUF135
QOUF135
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Square D
135
120
QOUF1351021
QOUF1351021
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Square D
35
120
QOUF1351042
QOUF1351042
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Square D
35
120
QOUF1401021
QOUF1401021
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Square D
40
120
QOUF1401042
QOUF1401042
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40
120
QOUF145
QOUF145
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Square D
45
120
QOUF1451021
QOUF1451021
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Square D
45
120
QOUF1451042
QOUF1451042
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Square D
45
120
QOUF150
QOUF150
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Square D
50
120
QOUF1501021
QOUF1501021
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Square D
50
120
QOUF1501042
QOUF1501042
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Square D
50
120
QOUF160
QOUF160
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Square D
60
120
QOUF1601021
QOUF1601021
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Square D
60
120
QOUF1601042
QOUF1601042
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Square D
60
120
QOUF170
QOUF170
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Square D
70
120
QOUF1701021
QOUF1701021
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Square D
70
120
QOUF1701042
QOUF1701042
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Square D
70
120
QOUF180
QOUF180
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Square D
80
120
QOUF1801021
QOUF1801021
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Square D
80
120
QOUF1801042
QOUF1801042
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Square D
80
120
QOUF190
QOUF190
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Square D
90
120
QOUF1901021
QOUF1901021
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Square D
90
120
QOUF1901042
QOUF1901042
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Square D
90
120
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.