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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
BQ2B06000S07
BQ2B06000S07
Limited Stock
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Siemens
60
240
BQ2B10000S07
BQ2B10000S07
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Siemens
100
240
BQ3B015QX
BQ3B015QX
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Siemens
15
240
BQ3B02001
BQ3B02001
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Siemens
20
120
BQ3B020HY
BQ3B020HY
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Siemens
20
240
BQ3B020QX
BQ3B020QX
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Siemens
20
120
BQ3B02501
BQ3B02501
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Siemens
25
240
BQ3B030H00S01
BQ3B030H00S01
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Siemens
30
240
BQ3B030HY
BQ3B030HY
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Siemens
30
240
BQ3B03501
BQ3B03501
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Siemens
35
240
BQ3B035H00S01
BQ3B035H00S01
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Siemens
35
240
BQ3B04001
BQ3B04001
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Siemens
40
240
BQ3B04501
BQ3B04501
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Siemens
45
240
BQ3B045QX
BQ3B045QX
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Siemens
45
240
BQ3B05001
BQ3B05001
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Siemens
50
240
BQ3B060HY
BQ3B060HY
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Siemens
60
240
BQ3B07001
BQ3B07001
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Siemens
70
240
BQ3B080Y
BQ3B080Y
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Siemens
80
240
BQ3B09000S07
BQ3B09000S07
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Siemens
90
240
BQ3B090H00S01
BQ3B090H00S01
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Siemens
90
240
BQ3B090Y
BQ3B090Y
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Siemens
90
240
BQ3B10001
BQ3B10001
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Siemens
100
240
BQ3B100HY
BQ3B100HY
Limited Stock
From
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Siemens
100
240
E1SED43B100
E1SED43B100
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Siemens
100
480
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.