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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
LV432893
LV432893
In Stock
From
$1,908.50
Schneider Electric
630
690
LV438930
LV438930
In Stock
From
$666.06
Schneider Electric
250
500
MGN61303
MGN61303
In Stock
From
$35.66
Square D
3
277
MGN61304
MGN61304
In Stock
From
$64.31
Schneider Electric
4
277
MGN61306
MGN61306
In Stock
From
$96.32
Schneider Electric
6
277
MGN61308
MGN61308
In Stock
From
$82.40
Schneider Electric
10
277
MGN61309
MGN61309
In Stock
From
$14.29
Schneider Electric
15
277
MGN61313
MGN61313
In Stock
From
$104.55
Schneider Electric
2
480
MGN61317
MGN61317
In Stock
From
$41.75
Square D
6
480
MGN61321
MGN61321
In Stock
From
$111.90
Square D
20
480
MGN61323
MGN61323
In Stock
From
$114.13
Schneider Electric
1
480
MGN61326
MGN61326
In Stock
From
$274.99
Schneider Electric
4
480
MGN61328
MGN61328
In Stock
From
$67.20
Square D
6
480
MGN61330
MGN61330
In Stock
From
$77.34
Schneider Electric
10
480
MGN61331
MGN61331
In Stock
From
$240.56
Square D
15
480
MGN61332
MGN61332
In Stock
From
$325.51
Schneider Electric
20
480
MGN61339
MGN61339
In Stock
From
$25.14
Schneider Electric
6
277
MGN61341
MGN61341
In Stock
From
$84.25
Square D
10
277
MGN61345
MGN61345
Limited Stock
From
Get Price
Schneider Electric
1
480
MGN61346
MGN61346
In Stock
From
$143.22
Square D
2
480
MGN61347
MGN61347
In Stock
From
$22.40
Square D
3
480
MGN61348
MGN61348
In Stock
From
$249.67
Square D
4
480
MGN61352
MGN61352
In Stock
From
$162.71
Schneider Electric
10
480
MGN61353
MGN61353
In Stock
From
$63.74
Schneider Electric
15
480
Popular Molded Case Circuit Breaker Manufacturers
Eaton
Square D
ABB
Siemens

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.