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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
BQ3B030QX
BQ3B030QX
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Siemens
30
120
BQ3B030Y
BQ3B030Y
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From
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Siemens
30
120
BQ3S060
BQ3S060
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Siemens
60
240
BQ3S060L
BQ3S060L
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Siemens
60
240
BQ3S100
BQ3S100
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Siemens
100
240
BQ3S100L
BQ3S100L
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Siemens
100
240
BQD6135
BQD6135
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Siemens
35
347
BQD6170
BQD6170
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Siemens
70
347
BQD6225
BQD6225
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Siemens
25
600
BQD6335
BQD6335
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Siemens
35
600
BQD6345
BQD6345
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Siemens
45
600
CQD190
CQD190
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Siemens
90
277
CQD61100
CQD61100
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Siemens
100
347
CQD6115
CQD6115
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Siemens
15
347
CQD6120
CQD6120
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Siemens
20
347
CQD6125
CQD6125
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Siemens
25
347
CQD6130
CQD6130
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Siemens
30
347
CQD6135
CQD6135
Limited Stock
From
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Siemens
35
347
CQD6140
CQD6140
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Siemens
40
347
CQD6145
CQD6145
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From
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Siemens
45
347
CQD6150
CQD6150
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Siemens
50
347
CQD6160
CQD6160
Limited Stock
From
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Siemens
60
347
CQD6170
CQD6170
Limited Stock
From
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Siemens
70
347
CQD6180
CQD6180
Limited Stock
From
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Siemens
80
347
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.