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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
NJL631100
NJL631100
In Stock
From
$620.48
Federal Pacific
100
600
NJL631100R
NJL631100R
In Stock
From
$6.46
Federal Pacific
100
600
NJL631125
NJL631125
In Stock
From
$292.38
Federal Pacific
125
600
NJL631125R
NJL631125R
In Stock
From
$1,475.91
American
125
600
NJL631150R
NJL631150R
In Stock
From
$223.78
Federal Pacific
150
600
NJL631175
NJL631175
In Stock
From
$1,458.27
American
175
600
NJL631200
NJL631200
In Stock
From
Get Price
American
200
600
NJL631225R
NJL631225R
In Stock
From
$786.25
American
225
600
NJL631250R
NJL631250R
In Stock
From
$402.56
Federal Pacific
250
600
NJL631300R
NJL631300R
In Stock
From
$357.96
Federal Pacific
300
600
NJL631350R
NJL631350R
In Stock
From
$350.03
Federal Pacific
350
600
NJL631400NA
NJL631400NA
In Stock
From
$830.04
American
400
600
NJL631400R
NJL631400R
In Stock
From
$968.04
Federal Pacific
400
600
NJL631500
NJL631500
Limited Stock
From
Get Price
American
500
600
NJL631600NA
NJL631600NA
In Stock
From
$1,806.71
American
600
600
NJL632100
NJL632100
In Stock
From
$666.70
American
100
600
NJL632125
NJL632125
In Stock
From
$3,636.00
American
125
600
NJL632150
NJL632150
In Stock
From
$2,267.31
Federal Pacific
150
600
NJL632175
NJL632175
In Stock
From
$3,272.40
Federal Pacific
175
600
NJL632200
NJL632200
In Stock
From
$3,272.40
American
200
600
NJL632225
NJL632225
In Stock
From
$1,451.51
Federal Pacific
225
600
NJL632250
NJL632250
In Stock
From
$3,272.40
Federal Pacific
250
600
NJL632300
NJL632300
In Stock
From
$1,313.49
Federal Pacific
300
600
NJL632500
NJL632500
In Stock
From
$2,825.12
Federal Pacific
500
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.