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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
LB2400F
LB2400F
In Stock
From
$665.45
Westinghouse
400
600
LB2400FS
LB2400FS
In Stock
From
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Westinghouse
400
600
LB2400K
LB2400K
In Stock
From
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Westinghouse
400
600
LB2400NW
LB2400NW
In Stock
From
$530.98
Westinghouse
400
600
LB2400S
LB2400S
In Stock
From
Get Price
Westinghouse
400
600
LB2400SK
LB2400SK
In Stock
From
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Westinghouse
400
600
LB2400WK
LB2400WK
In Stock
From
Get Price
Westinghouse
400
600
LB2400WSK
LB2400WSK
In Stock
From
Get Price
Westinghouse
400
600
LB3070
LB3070
In Stock
From
$859.93
Westinghouse
70
600
LB3070S
LB3070S
In Stock
From
$944.45
Westinghouse
70
600
LB3090
LB3090
In Stock
From
$1,422.46
Westinghouse
90
600
LB3090S
LB3090S
In Stock
From
$1,422.46
Westinghouse
90
600
LB3100
LB3100
In Stock
From
$2,042.77
Westinghouse
100
600
LB3100S
LB3100S
In Stock
From
$1,620.35
Westinghouse
100
600
LB3125S
LB3125S
In Stock
From
Get Price
Westinghouse
125
600
LB3150S
LB3150S
In Stock
From
$907.37
Westinghouse
150
600
LB3175
LB3175
In Stock
From
$941.24
Westinghouse
175
600
LB3175S
LB3175S
In Stock
From
$941.24
Westinghouse
175
600
LB3200
LB3200
In Stock
From
$695.68
Westinghouse
200
600
LB3200S
LB3200S
In Stock
From
$200.00
Westinghouse
200
600
LB3225
LB3225
In Stock
From
$403.15
Westinghouse
225
600
LB3225S
LB3225S
In Stock
From
$1,119.04
Westinghouse
225
600
LB3250S
LB3250S
In Stock
From
Get Price
Westinghouse
250
600
LB3300S
LB3300S
In Stock
From
$1,089.00
Westinghouse
300
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.