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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
ED61B100L
ED61B100L
Limited Stock
From
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Siemens
100
600
ED62B045L
ED62B045L
Limited Stock
From
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Siemens
45
600
HED41B050
HED41B050
Limited Stock
From
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Siemens
50
277
HED41B070
HED41B070
Limited Stock
From
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Siemens
70
277
HED41B080
HED41B080
Limited Stock
From
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Siemens
80
277
HED41B090
HED41B090
Limited Stock
From
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Siemens
90
277
HNX3B900
HNX3B900
Limited Stock
From
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Siemens
900
600
NGG3B035
NGG3B035
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Siemens
35
600
NGG3B080
NGG3B080
Limited Stock
From
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Siemens
80
600
NGG3B090
NGG3B090
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Siemens
90
600
NGG3B110
NGG3B110
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Siemens
110
600
NGG3B110L
NGG3B110L
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Siemens
110
600
QJH23B100
QJH23B100
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From
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Siemens
100
240
5SX2110-8
5SX2110-8
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From
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Siemens
10
400
B11500S07
B11500S07
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From
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Siemens
15
240
B12000S07
B12000S07
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Siemens
20
240
B210000S07
B210000S07
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Siemens
100
240
B2100R
B2100R
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Siemens
100
240
B212500S07
B212500S07
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Siemens
125
240
BQ1B015A01
BQ1B015A01
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From
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Siemens
15
120
BQ1B02500S07
BQ1B02500S07
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From
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Siemens
25
120
BQ1B04000S01
BQ1B04000S01
Limited Stock
From
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Siemens
40
120
BQ1B050L
BQ1B050L
Limited Stock
From
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Siemens
50
120
BQ2B020H00S07
BQ2B020H00S07
Limited Stock
From
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Siemens
20
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.