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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
37018
37018
Limited Stock
From
Get Price
Merlin Gerin
250
600
37026
37026
In Stock
From
$7.66
Merlin Gerin
250
600
37034
37034
Limited Stock
From
Get Price
Merlin Gerin
250
600
371D426G02
371D426G02
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G03
371D426G03
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G04
371D426G04
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G05
371D426G05
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G06
371D426G06
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G07
371D426G07
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G08
371D426G08
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G12
371D426G12
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G13
371D426G13
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G14
371D426G14
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G15
371D426G15
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G16
371D426G16
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G17
371D426G17
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G18
371D426G18
In Stock
From
$1,536.70
Westinghouse
400
600
371D426G22
371D426G22
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G23
371D426G23
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G24
371D426G24
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G25
371D426G25
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G26
371D426G26
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G27
371D426G27
In Stock
From
$1,285.57
Westinghouse
400
600
371D426G28
371D426G28
In Stock
From
$1,285.57
Westinghouse
400
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.