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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
Q290HH00S01
Q290HH00S01
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Siemens
90
240
Q320H00S01
Q320H00S01
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Siemens
20
240
Q330HH00S01
Q330HH00S01
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Siemens
30
240
Q340HH
Q340HH
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Siemens
40
240
Q37000S07
Q37000S07
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Siemens
70
240
QT1-3030
QT1-3030
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Siemens
30
240
QT2020
QT2020
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Siemens
20
240
5SU1356-7KK10
5SU1356-7KK10
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Siemens
10
400
BQ2B025H00S01
BQ2B025H00S01
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Siemens
25
240
BQ2B045H00S01
BQ2B045H00S01
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Siemens
45
240
BQ2B060H00S01
BQ2B060H00S01
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Siemens
60
240
BQ2B090H00S01
BQ2B090H00S01
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Siemens
90
240
BQ2B11000S01
BQ2B11000S01
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Siemens
110
240
CED62B080
CED62B080
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Siemens
80
600
CND63B900H
CND63B900H
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Siemens
900
600
ED21B045L
ED21B045L
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Siemens
45
120
ED21B050L
ED21B050L
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Siemens
50
120
ED61B025
ED61B025
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Siemens
25
600
ED61B070
ED61B070
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Siemens
70
600
ED61B070L
ED61B070L
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Siemens
70
600
ED61B080
ED61B080
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From
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Siemens
80
600
ED61B090
ED61B090
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From
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Siemens
90
600
ED61B090L
ED61B090L
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From
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Siemens
90
600
ED61B100
ED61B100
Limited Stock
From
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Siemens
100
600
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.