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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.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
Voltage
QO260NATS
QO260NATS
In Stock
From
$26.78
Square D
60
240
QOB1151201
QOB1151201
In Stock
From
$96.46
Square D
15
120
QOB115CAFI
QOB115CAFI
In Stock
From
$79.89
Square D
15
120
QOB115VH1021
QOB115VH1021
Limited Stock
From
Get Price
Square D
15
120
QOB1201021
QOB1201021
In Stock
From
$128.66
Schneider Electric
20
120
QOB1205237
QOB1205237
In Stock
From
$33.52
Square D
20
120
QOB120HID
QOB120HID
In Stock
From
$23.91
Square D
20
120
QOB120PL
QOB120PL
In Stock
From
$38.22
Square D
20
240
QOB120SWN
QOB120SWN
In Stock
From
$113.37
Square D
20
120
QOB120VHAFI
QOB120VHAFI
In Stock
From
$37.61
Square D
20
120
QOB130EPD2100
QOB130EPD2100
In Stock
From
$175.94
Schneider Electric
30
120
QOB130HID
QOB130HID
In Stock
From
$13.43
Square D
30
120
QOB130VH1021
QOB130VH1021
In Stock
From
$308.44
Square D
30
120
QOB2100
QOB2100
In Stock
From
$38.74
Square D
100
120
QOB2105237
QOB2105237
In Stock
From
$51.50
Square D
10
120
QOB2125SL
QOB2125SL
In Stock
From
$55.92
Square D
125
120
QOB2125VH
QOB2125VH
In Stock
From
$422.37
Square D
125
240
QOB2155237
QOB2155237
In Stock
From
$148.86
Square D
15
120
QOB2155252
QOB2155252
In Stock
From
$261.31
Square D
15
120
QOB215VH
QOB215VH
In Stock
From
$57.02
Square D
15
240
QOB2205252
QOB2205252
In Stock
From
$231.97
Square D
20
120
QOB220EPD1200
QOB220EPD1200
In Stock
From
$636.14
Square D
20
120
QOB220SWN
QOB220SWN
In Stock
From
$200.99
Square D
20
120
QOB2305237
QOB2305237
In Stock
From
$152.54
Square D
30
120
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.