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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
QO250SWN1021
QO250SWN1021
In Stock
From
$200.00
Square D
50
120
QO2601021
QO2601021
In Stock
From
$256.92
Square D
60
240
QO2801021
QO2801021
In Stock
From
$360.92
Square D
80
240
QO310SWN
QO310SWN
In Stock
From
$126.43
Square D
10
240
QO315SWN
QO315SWN
In Stock
From
$25.18
Square D
15
240
QO320SWN
QO320SWN
In Stock
From
$115.62
Square D
20
240
QO340SWN
QO340SWN
In Stock
From
$35.78
Square D
40
240
QO350EPD
QO350EPD
In Stock
From
$990.29
Square D
50
120
QOB115AFI
QOB115AFI
In Stock
From
$57.00
Square D
15
120
QOB115AS
QOB115AS
In Stock
From
$61.25
Square D
15
120
QOB115DF
QOB115DF
In Stock
From
$231.76
Schneider Electric
15
120
QOB115VH
QOB115VH
In Stock
From
$34.69
Schneider Electric
15
120
QOB1301021
QOB1301021
In Stock
From
$123.83
Square D
30
120
QOB21001021
QOB21001021
In Stock
From
$260.89
Square D
100
120
QOB2110
QOB2110
In Stock
From
$145.36
Square D
110
120
QOB2151021
QOB2151021
In Stock
From
$154.25
Square D
15
120
QOB215GFI
QOB215GFI
In Stock
From
$227.72
Schneider Electric
15
240
QOB2201021
QOB2201021
In Stock
From
$272.38
Square D
20
120
QOB225VH1021
QOB225VH1021
In Stock
From
$187.07
Square D
25
240
QOB240EPD
QOB240EPD
In Stock
From
$415.05
Square D
40
120
QOB240GFI
QOB240GFI
In Stock
From
$173.30
Schneider Electric
40
240
QOB2451021
QOB2451021
In Stock
From
$284.51
Square D
45
120
QOB245PL
QOB245PL
In Stock
From
$421.03
Square D
45
120
QOB250EPD
QOB250EPD
In Stock
From
$373.58
Square D
50
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.