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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
PXF361200LS
PXF361200LS
In Stock
From
$9,332.92
Square D
1200
600
PXF361600
PXF361600
In Stock
From
$16,113.29
Square D
1600
600
PXF362500
PXF362500
In Stock
From
$11,004.50
Square D
2500
600
Q110
Q110
In Stock
From
$8.91
Siemens
10
120
Q115H
Q115H
In Stock
From
$20.77
Siemens
15
120
Q12000S01
Q12000S01
In Stock
From
$76.73
Siemens
20
120
Q120DFN
Q120DFN
In Stock
From
$38.23
Siemens
20
240
Q120DFWG
Q120DFWG
In Stock
From
$92.72
Schneider Electric
20
120
Q125
Q125
In Stock
From
$6.96
Siemens
25
120
Q130H
Q130H
In Stock
From
$20.54
Siemens
30
120
Q135
Q135
In Stock
From
$6.56
Siemens
35
120
Q140H
Q140H
In Stock
From
$25.77
Siemens
40
120
Q145
Q145
In Stock
From
$10.85
Siemens
45
120
Q160H
Q160H
In Stock
From
$41.78
Siemens
60
120
Q170H
Q170H
In Stock
From
$96.02
Siemens
70
120
Q2020AFC
Q2020AFC
In Stock
From
$90.03
Siemens
20
240
Q210000S01
Q210000S01
In Stock
From
$138.42
Siemens
100
240
Q2100HH
Q2100HH
In Stock
From
$107.08
Siemens
100
240
Q2125HH
Q2125HH
In Stock
From
$259.16
Siemens
125
240
Q21520CT
Q21520CT
In Stock
From
$37.96
Siemens
20
240
Q21530CT
Q21530CT
In Stock
From
$34.41
Siemens
30
240
Q21540CT
Q21540CT
In Stock
From
$37.34
Siemens
40
240
Q21540CTNC
Q21540CTNC
In Stock
From
$41.03
Siemens
40
240
Q21550CT
Q21550CT
In Stock
From
$35.86
Siemens
50
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.