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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
Q235H01
Q235H01
Limited Stock
From
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Siemens
35
240
Q235HH00S07
Q235HH00S07
Limited Stock
From
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Siemens
35
240
Q235HH01
Q235HH01
Limited Stock
From
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Siemens
35
240
Q240R00S07
Q240R00S07
Limited Stock
From
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Siemens
40
240
Q240R01
Q240R01
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Siemens
40
240
Q242015
Q242015
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Zinsco
15
240
Q242020
Q242020
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Zinsco
20
240
Q2430-200
Q2430-200
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Zinsco
20
240
Q243015D
Q243015D
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Zinsco
15
240
Q243020D
Q243020D
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Zinsco
20
240
Q243030D
Q243030D
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Zinsco
30
240
Q243040D
Q243040D
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Zinsco
40
240
Q243060D
Q243060D
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Zinsco
60
240
Q243070D
Q243070D
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Zinsco
70
240
Q24500S01
Q24500S01
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Siemens
45
240
Q24500S07
Q24500S07
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Siemens
45
240
Q24501
Q24501
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Siemens
45
240
Q245H00S01
Q245H00S01
Limited Stock
From
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Siemens
45
240
Q245H00S07
Q245H00S07
Limited Stock
From
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Siemens
45
240
Q245H01
Q245H01
Limited Stock
From
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Siemens
45
240
Q245HH00S07
Q245HH00S07
Limited Stock
From
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Siemens
45
240
Q245HH01
Q245HH01
Limited Stock
From
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Siemens
45
240
Q250H00S07
Q250H00S07
Limited Stock
From
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Siemens
50
240
Q250H01
Q250H01
Limited Stock
From
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Siemens
50
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.