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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
Amperage
Voltage
NS1600H
NS1600H
Limited Stock
From
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Schneider Electric
1600
690
NS160H
NS160H
Limited Stock
From
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Merlin Gerin
160
690
NS160NA
NS160NA
Limited Stock
From
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Square D
160
440
NS2000H
NS2000H
Limited Stock
From
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Square D
2000
690
NS2000N
NS2000N
Limited Stock
From
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Merlin Gerin
2000
690
NS250H
NS250H
Limited Stock
From
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Merlin Gerin
250
690
NS250NA
NS250NA
Limited Stock
From
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Merlin Gerin
250
440
NS400H
NS400H
Limited Stock
From
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Schneider Electric
400
690
NS400L
NS400L
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From
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Merlin Gerin
400
690
NS400N
NS400N
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From
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Schneider Electric
400
690
NS630L
NS630L
Limited Stock
From
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Merlin Gerin
630
690
NS800H
NS800H
Limited Stock
From
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Merlin Gerin
800
690
NS800L
NS800L
Limited Stock
From
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Square D
800
690
NS800N
NS800N
Limited Stock
From
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Merlin Gerin
800
690
NS80N
NS80N
Limited Stock
From
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Merlin Gerin
80
690
NSX100H
NSX100H
Limited Stock
From
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Schneider Electric
100
690
NSX160H
NSX160H
Limited Stock
From
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Schneider Electric
160
690
NSX250H
NSX250H
Limited Stock
From
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Schneider Electric
250
690
NSX250L
NSX250L
Limited Stock
From
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Schneider Electric
250
690
NSX250N
NSX250N
Limited Stock
From
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Schneider Electric
250
690
NSX400H
NSX400H
Limited Stock
From
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Schneider Electric
400
690
NSX400NA
NSX400NA
Limited Stock
From
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Schneider Electric
400
690
PGA36025U43A
PGA36025U43A
Limited Stock
From
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Schneider Electric
250
600
PGA36040U31A
PGA36040U31A
Limited Stock
From
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Square D
400
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.