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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
HDA36040AABKUHYP
HDA36040AABKUHYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUJ
HDA36040AABKUJ
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUJYP
HDA36040AABKUJYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUK
HDA36040AABKUK
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUKYP
HDA36040AABKUKYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUN
HDA36040AABKUN
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUNYP
HDA36040AABKUNYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUO
HDA36040AABKUO
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUOYP
HDA36040AABKUOYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUP
HDA36040AABKUP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUPYP
HDA36040AABKUPYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUR
HDA36040AABKUR
In Stock
From
$911.98
Square D
40
600
HDA36040AABKURYP
HDA36040AABKURYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUS
HDA36040AABKUS
In Stock
From
$911.98
Square D
40
600
HDA36040AABKUSYP
HDA36040AABKUSYP
In Stock
From
$911.98
Square D
40
600
HDA36040AABKYP
HDA36040AABKYP
In Stock
From
$911.98
Square D
40
600
HDA36040AASD
HDA36040AASD
In Stock
From
$911.98
Square D
40
600
HDA36040AASDYP
HDA36040AASDYP
In Stock
From
$911.98
Square D
40
600
HDA36040AASH
HDA36040AASH
In Stock
From
$911.98
Square D
40
600
HDA36040AASHYP
HDA36040AASHYP
In Stock
From
$911.98
Square D
40
600
HDA36040AASJ
HDA36040AASJ
In Stock
From
$911.98
Square D
40
600
HDA36040AASJYP
HDA36040AASJYP
In Stock
From
$911.98
Square D
40
600
HDA36040AASK
HDA36040AASK
In Stock
From
$911.98
Square D
40
600
HDA36040AASKYP
HDA36040AASKYP
In Stock
From
$911.98
Square D
40
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.