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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
Q2B32150
Q2B32150
In Stock
From
$3.40
Square D
Q2B32225
Q2B32225
In Stock
From
$38.56
Square D
Q2L32225
Q2L32225
In Stock
From
$91.80
Square D
Q2M3125
Q2M3125
In Stock
From
$15.89
Square D
Q2M3150
Q2M3150
In Stock
From
$121.70
Square D
Q2M3225
Q2M3225
In Stock
From
$125.83
Square D
Q2MB125
Q2MB125
In Stock
From
$0.02
Square D
Q2MT225
Q2MT225
In Stock
From
$243.69
Square D
Q4L32250
Q4L32250
In Stock
From
$83.18
Square D
Q4L32300
Q4L32300
In Stock
From
$104.69
Square D
Q4L32350
Q4L32350
In Stock
From
$104.69
Square D
QNR2150
QNR2150
In Stock
From
$0.04
Square D
QO1202100
QO1202100
In Stock
From
$43.89
Square D
QO130X
QO130X
In Stock
From
$1.48
Square D
QO2100NRB
QO2100NRB
In Stock
From
$36.82
Square D
QO220-35
QO220-35
In Stock
From
$1.61
Square D
QO240SWN35
QO240SWN35
In Stock
From
$79.36
Square D
QO3305237
QO3305237
In Stock
From
$83.71
Square D
QOL3125
QOL3125
In Stock
From
$55.09
Square D
QOL3225
QOL3225
In Stock
From
$210.73
Square D
QOM125
QOM125
In Stock
From
$66.46
Square D
QOM150
QOM150
In Stock
From
$0.03
Square D
QOM225
QOM225
In Stock
From
$102.94
Square D
QOT2020-OLDSTYLE
QOT2020-OLDSTYLE
In Stock
From
$0.02
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.