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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
Q135H
Q135H
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Siemens
35
120
Q145H
Q145H
Limited Stock
From
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Siemens
45
120
Q150H
Q150H
Limited Stock
From
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Siemens
50
120
Q210000S07
Q210000S07
Limited Stock
From
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Siemens
100
240
Q2100H00S01
Q2100H00S01
Limited Stock
From
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Siemens
100
240
Q21500S07
Q21500S07
Limited Stock
From
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Siemens
15
240
Q215AFH
Q215AFH
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Siemens
15
240
Q215AFI
Q215AFI
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Siemens
15
240
Q215HH
Q215HH
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Siemens
15
240
Q220AFCH
Q220AFCH
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Siemens
20
240
Q240HH
Q240HH
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Siemens
40
240
Q330H00S01
Q330H00S01
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Siemens
30
240
Q345HH
Q345HH
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Siemens
45
240
Q370HH
Q370HH
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Siemens
70
240
QF115AH
QF115AH
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Siemens
15
120
QF120AHH
QF120AHH
Limited Stock
From
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Siemens
20
120
QJ22B07000S01
QJ22B07000S01
Limited Stock
From
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Siemens
70
240
QJ22B07000S07
QJ22B07000S07
Limited Stock
From
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Siemens
70
240
QJ22B08000S01
QJ22B08000S01
Limited Stock
From
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Siemens
80
240
QJ22B08000S07
QJ22B08000S07
Limited Stock
From
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Siemens
80
240
QJ22B08000S11
QJ22B08000S11
Limited Stock
From
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Siemens
80
240
QJ22B09000S01
QJ22B09000S01
Limited Stock
From
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Siemens
90
240
QJ22B09000S07
QJ22B09000S07
Limited Stock
From
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Siemens
90
240
QJ22B09000S11
QJ22B09000S11
Limited Stock
From
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Siemens
90
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.