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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
XO240
XO240
In Stock
From
$168.57
Cutler Hammer
40
240
1256C10G02
1256C10G02
In Stock
From
$1,820.60
Cutler Hammer
250
600
1256C10G03
1256C10G03
In Stock
From
Get Price
Westinghouse
300
600
1256C10G04
1256C10G04
In Stock
From
$1,482.98
Cutler Hammer
350
600
1256C10G05
1256C10G05
In Stock
From
$3,178.04
Westinghouse
400
600
1256C10G12
1256C10G12
In Stock
From
$3,160.08
Westinghouse
250
600
1256C10G13
1256C10G13
In Stock
From
$2,544.74
Westinghouse
300
600
1256C10G14
1256C10G14
In Stock
From
$2,891.47
Westinghouse
350
600
1256C10G15
1256C10G15
In Stock
From
$1,565.34
Cutler Hammer
400
600
1268C14G04
1268C14G04
In Stock
From
$531.80
Westinghouse
100
600
1366D21G38
1366D21G38
In Stock
From
$1,372.22
Cutler Hammer
50
600
373B237G01
373B237G01
In Stock
From
Get Price
Westinghouse
400
600
373B237G02
373B237G02
In Stock
From
$1,154.89
Cutler Hammer
400
600
504C740G02
504C740G02
In Stock
From
$1,379.28
Westinghouse
70
600
504C740G03
504C740G03
In Stock
From
$2,549.54
Westinghouse
90
600
504C740G04
504C740G04
In Stock
From
$2,631.41
Westinghouse
100
600
504C740G05
504C740G05
In Stock
From
$978.20
Westinghouse
125
600
504C740G06
504C740G06
In Stock
From
$1,019.30
Westinghouse
150
600
504C740G07
504C740G07
In Stock
From
$1,142.89
Cutler Hammer
175
600
504C740G08
504C740G08
In Stock
From
$1,367.23
Westinghouse
200
600
504C740G09
504C740G09
In Stock
From
$833.46
Cutler Hammer
225
600
504C740G10
504C740G10
In Stock
From
$1,317.20
Westinghouse
250
600
504C740G11
504C740G11
In Stock
From
$1,248.30
Cutler Hammer
300
600
504C740G12
504C740G12
In Stock
From
$1,482.98
Cutler Hammer
350
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.