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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
HDA36030AASJ
HDA36030AASJ
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASJYP
HDA36030AASJYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASK
HDA36030AASK
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASKYP
HDA36030AASKYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASL
HDA36030AASL
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASLYP
HDA36030AASLYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASN
HDA36030AASN
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASNYP
HDA36030AASNYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASP
HDA36030AASP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASPYP
HDA36030AASPYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASR
HDA36030AASR
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASRYP
HDA36030AASRYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASV
HDA36030AASV
In Stock
From
$1,179.92
Square D
30
600
HDA36030AASVYP
HDA36030AASVYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUA
HDA36030AAUA
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUAYP
HDA36030AAUAYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUD
HDA36030AAUD
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUDYP
HDA36030AAUDYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUH
HDA36030AAUH
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUHYP
HDA36030AAUHYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUJ
HDA36030AAUJ
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUJYP
HDA36030AAUJYP
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUK
HDA36030AAUK
In Stock
From
$1,179.92
Square D
30
600
HDA36030AAUKYP
HDA36030AAUKYP
In Stock
From
$1,179.92
Square D
30
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.