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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
LGB1B050B
LGB1B050B
In Stock
From
$167.98
Siemens
50
347
LGB2B020B
LGB2B020B
In Stock
From
$318.16
Siemens
20
600
LGB2B025B
LGB2B025B
In Stock
From
$420.36
Siemens
25
600
LGB2B030B
LGB2B030B
In Stock
From
$262.77
Siemens
30
600
LGB2B060B
LGB2B060B
In Stock
From
$200.15
Siemens
60
600
LGB2B100B
LGB2B100B
In Stock
From
$329.98
Siemens
100
600
LGB2B125B
LGB2B125B
In Stock
From
$551.87
Siemens
125
600
LGB3B100
LGB3B100
In Stock
From
$382.62
Siemens
100
600
LGC3600FAW
LGC3600FAW
In Stock
From
$3,964.79
Eaton
600
600
LGF36400U31X
LGF36400U31X
In Stock
From
$2,037.76
Schneider Electric
400
600
LGF36400U33X
LGF36400U33X
In Stock
From
$4,563.18
Schneider Electric
400
600
LGG3B040L
LGG3B040L
In Stock
From
$606.04
Siemens
40
600
LGG3B050L
LGG3B050L
In Stock
From
$697.61
Siemens
50
600
LGG3B100
LGG3B100
In Stock
From
$333.33
Siemens
100
600
LGL36400CU31X
LGL36400CU31X
In Stock
From
$2,935.76
Square D
400
600
LGL36400CU33X
LGL36400CU33X
In Stock
From
$4,481.62
Square D
400
600
LGL36400M37X
LGL36400M37X
In Stock
From
$5,284.64
Schneider Electric
400
600
LGL36400U44X
LGL36400U44X
In Stock
From
$5,146.37
Square D
400
600
LGL36600U31X
LGL36600U31X
In Stock
From
$4,353.46
Square D
600
600
LGL36600U33X
LGL36600U33X
In Stock
From
$4,386.68
Schneider Electric
600
600
LGP36400CU31X
LGP36400CU31X
In Stock
From
$4,403.87
Schneider Electric
400
600
LGP36400CU33X
LGP36400CU33X
In Stock
From
$5,146.37
Square D
400
600
LGP36400U31X
LGP36400U31X
In Stock
From
$6,157.84
Square D
400
600
LGP36600U31X
LGP36600U31X
In Stock
From
$2,089.01
Square D
600
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.