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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
JA21250M
JA21250M
In Stock
From
$86.27
Westinghouse
225
600
JA21250MW
JA21250MW
In Stock
From
$97.06
Westinghouse
225
600
JA21250SM
JA21250SM
In Stock
From
$97.06
Westinghouse
225
600
JA21250SMW
JA21250SMW
In Stock
From
$86.27
Westinghouse
225
600
JA2125S
JA2125S
In Stock
From
$1,820.56
Westinghouse
125
600
JA2125SW
JA2125SW
In Stock
From
$1,820.56
Westinghouse
125
600
JA2150
JA2150
In Stock
From
$297.65
Cutler Hammer
150
600
JA21500M
JA21500M
In Stock
From
$97.06
Westinghouse
225
600
JA21500MW
JA21500MW
In Stock
From
$86.27
Westinghouse
225
600
JA21500SM
JA21500SM
In Stock
From
$97.06
Westinghouse
225
600
JA2150AW
JA2150AW
In Stock
From
$399.42
Westinghouse
150
600
JA2150S
JA2150S
In Stock
From
$399.42
Westinghouse
150
600
JA2150SW
JA2150SW
In Stock
From
$399.42
Westinghouse
150
600
JA2150W
JA2150W
In Stock
From
$135.78
Westinghouse
150
600
JA2175
JA2175
In Stock
From
$105.74
Westinghouse
175
600
JA21750M
JA21750M
In Stock
From
$97.06
Westinghouse
225
600
JA21750MW
JA21750MW
In Stock
From
$86.27
Westinghouse
225
600
JA21750SM
JA21750SM
In Stock
From
$86.27
Westinghouse
225
600
JA21750SMW
JA21750SMW
In Stock
From
$86.27
Westinghouse
225
600
JA2175S
JA2175S
In Stock
From
$477.59
Westinghouse
175
600
JA2175SW
JA2175SW
In Stock
From
$477.59
Westinghouse
175
600
JA2175W
JA2175W
In Stock
From
$477.59
Westinghouse
175
600
JA2200S
JA2200S
In Stock
From
$425.09
Westinghouse
200
600
JA2200SW
JA2200SW
In Stock
From
$425.09
Westinghouse
200
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.