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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
NJJ231300
NJJ231300
In Stock
From
$152.94
Federal Pacific
NJL227300
NJL227300
In Stock
From
$22.22
Federal Pacific
NJL237300
NJL237300
In Stock
From
$20.00
Federal Pacific
NJL436100
NJL436100
In Stock
From
$157.02
Federal Pacific
NJL436150
NJL436150
In Stock
From
$157.02
Federal Pacific
NJL436200
NJL436200
In Stock
From
$157.02
Federal Pacific
NJL436300
NJL436300
In Stock
From
$157.02
Federal Pacific
NJL436350
NJL436350
In Stock
From
$201.89
Federal Pacific
NJL436400
NJL436400
In Stock
From
$201.89
Federal Pacific
NJL437300
NJL437300
In Stock
From
$100.00
Federal Pacific
NJL631275
NJL631275
In Stock
From
$632.39
Federal Pacific
NJL631300-400HZ
NJL631300-400HZ
In Stock
From
$2.22
Federal Pacific
NJS6212
NJS6212
In Stock
From
$27.91
Federal Pacific
NKL631400NA
NKL631400NA
In Stock
From
$11.24
Federal Pacific
NM031125
NM031125
In Stock
From
$1.47
Federal Pacific
NM031150
NM031150
In Stock
From
$3.67
Federal Pacific
NM031175
NM031175
In Stock
From
$0.58
Federal Pacific
NM622F800
NM622F800
In Stock
From
$67.78
Federal Pacific
NM631450
NM631450
In Stock
From
$594.21
Federal Pacific
NM631700
NM631700
In Stock
From
$718.79
Federal Pacific
NM632T450
NM632T450
In Stock
From
$2.22
Federal Pacific
NM632T500
NM632T500
In Stock
From
$166.67
Federal Pacific
NM632T700
NM632T700
In Stock
From
$2.22
Federal Pacific
NM632T800
NM632T800
In Stock
From
$2.22
Federal Pacific
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.