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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
B28000S07
B28000S07
Limited Stock
From
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Siemens
80
240
B29000S07
B29000S07
Limited Stock
From
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Siemens
90
240
B290H00S01
B290H00S01
Limited Stock
From
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Siemens
90
240
B290H00S07
B290H00S07
Limited Stock
From
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Siemens
90
240
B310000W01
B310000W01
Limited Stock
From
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Siemens
100
240
B31500S07
B31500S07
Limited Stock
From
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Siemens
15
240
B315H00S07
B315H00S07
Limited Stock
From
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Siemens
15
240
B315HH00S07
B315HH00S07
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Siemens
15
240
B320H00S07
B320H00S07
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Siemens
20
240
B320HH00S07
B320HH00S07
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Siemens
20
240
B32500S07
B32500S07
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Siemens
25
240
B325H00S07
B325H00S07
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Siemens
25
240
B33000S07
B33000S07
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From
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Siemens
30
240
B330H00S07
B330H00S07
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Siemens
30
240
B330HH00S07
B330HH00S07
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From
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Siemens
30
240
B33500S07
B33500S07
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Siemens
35
240
B34000S07
B34000S07
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Siemens
40
240
B340H00S07
B340H00S07
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From
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Siemens
40
240
B340HH00S07
B340HH00S07
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Siemens
40
240
B340HM
B340HM
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Siemens
40
240
B34500S07
B34500S07
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Siemens
45
240
B345H00S01
B345H00S01
Limited Stock
From
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Siemens
45
240
B35000S07
B35000S07
Limited Stock
From
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Siemens
50
240
B350H00S07
B350H00S07
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.