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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
MH36300
MH36300
In Stock
From
$1,179.90
Square D
300
600
MH36350
MH36350
In Stock
From
$2,391.29
Square D
350
600
MH36400
MH36400
In Stock
From
$3,828.65
Square D
400
600
MH36800
MH36800
In Stock
From
$5,168.36
Square D
800
600
MHF36400
MHF36400
In Stock
From
$1,131.92
Square D
400
600
MHF36800
MHF36800
In Stock
From
$2,251.19
Square D
800
600
MHL26600
MHL26600
In Stock
From
$1,229.71
Square D
600
600
MHL36000M
MHL36000M
In Stock
From
$4,502.98
Square D
1000
600
MHL361000
MHL361000
In Stock
From
$4,660.47
Square D
1000
600
MHL3610001426
MHL3610001426
In Stock
From
$2,068.12
Square D
1000
600
MHL3612001287
MHL3612001287
In Stock
From
$1,673.25
Square D
1200
600
MHL3612001386
MHL3612001386
In Stock
From
$7,163.28
Square D
1200
600
MHL36300
MHL36300
In Stock
From
$3,202.42
Square D
300
600
MHL363501212
MHL363501212
In Stock
From
$525.21
Square D
350
600
MHL364001212
MHL364001212
In Stock
From
$1,195.41
Square D
400
600
MHL3645025DC
MHL3645025DC
In Stock
From
$2,500.92
Square D
450
600
MHL3645025DC1679
MHL3645025DC1679
In Stock
From
$290.87
Square D
450
600
MHL3645025DC3903
MHL3645025DC3903
In Stock
From
$1,366.79
Square D
450
500
MHL3645031DC2351
MHL3645031DC2351
In Stock
From
$2,245.84
Square D
450
600
MHL36500
MHL36500
In Stock
From
$2,087.75
Square D
500
600
MHL3650032DC
MHL3650032DC
In Stock
From
$1,532.65
Square D
500
600
MHL36700
MHL36700
In Stock
From
$2,075.16
Square D
700
600
MHL368001212
MHL368001212
In Stock
From
$1,225.46
Square D
800
600
MHL368001352
MHL368001352
In Stock
From
$3,220.27
Square D
800
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.