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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.
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Part Number
PRICE
Manufacturer
QOT215215
QOT215215
In Stock
From
$1.48
Square D
RLF36120U44AYP
RLF36120U44AYP
In Stock
From
$693.88
Square D
RLF36250YP
RLF36250YP
In Stock
From
$0.02
Square D
RLTB
RLTB
In Stock
From
$456.60
Square D
SDT2125
SDT2125
In Stock
From
$8.53
Square D
SEF361600LSA
SEF361600LSA
In Stock
From
$2,666.67
Square D
SEM361600LI
SEM361600LI
In Stock
From
$11.11
Square D
SQDS202DE504
SQDS202DE504
In Stock
From
$349.00
Square D
SQDS206DE504
SQDS206DE504
In Stock
From
$349.00
Square D
SQDS208DE504
SQDS208DE504
In Stock
From
$349.00
Square D
SQDS208DM504
SQDS208DM504
In Stock
From
$349.00
Square D
ST13N
ST13N
In Stock
From
$52.29
Square D
X13450307020
X13450307020
In Stock
From
$822.40
Square D
527999P1
527999P1
In Stock
From
$0.02
Square D
528093P1
528093P1
In Stock
From
$473.75
Square D
528251P1
528251P1
In Stock
From
$0.02
Square D
531741P1
531741P1
In Stock
From
$3,518.40
Square D
547682P1
547682P1
In Stock
From
$9.97
Square D
558649P2
558649P2
Limited Stock
From
Get Price
Square D
8998HBF050
8998HBF050
In Stock
From
$1,880.82
Schneider Electric
987327
987327
In Stock
From
$154.29
Square D
989340
989340
In Stock
From
$70.54
Square D
994360
994360
In Stock
From
$4.96
Square D
997300
997300
In Stock
From
$138.34
Square D
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.