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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
PKL36040U31A
PKL36040U31A
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Schneider Electric
400
600
PKL36040U33A
PKL36040U33A
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Square D
400
600
PKL36060CU43A
PKL36060CU43A
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Square D
600
600
PKL36080
PKL36080
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Square D
800
600
PKL36080CU33A
PKL36080CU33A
Limited Stock
From
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Schneider Electric
800
600
PKL36080CU43A
PKL36080CU43A
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Schneider Electric
800
600
PKL36080CU63AE1
PKL36080CU63AE1
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Square D
800
600
PKL36080U31A
PKL36080U31A
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Square D
800
600
PKL36080U43A
PKL36080U43A
Limited Stock
From
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Square D
800
600
PKL36080U63AE1
PKL36080U63AE1
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Schneider Electric
800
600
PKL36100
PKL36100
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Square D
1000
600
PKL36100CU31A
PKL36100CU31A
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Schneider Electric
1000
600
PKL36100U33A
PKL36100U33A
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Square D
1000
600
PKL36100U44A
PKL36100U44A
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Schneider Electric
1000
600
PKL36120
PKL36120
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Square D
1200
600
PKL36120CU33A
PKL36120CU33A
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Square D
1200
600
PKL36120CU43A
PKL36120CU43A
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Schneider Electric
1200
600
PKL36120CU44A
PKL36120CU44A
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Square D
1200
600
PKL36120U64AE1
PKL36120U64AE1
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Square D
1200
600
PKM36120
PKM36120
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Schneider Electric
1200
600
PKP36080CU31A
PKP36080CU31A
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Schneider Electric
800
600
PL800
PL800
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Square D
800
480
PLA34040CU43A
PLA34040CU43A
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Square D
400
480
PLA34040U31A
PLA34040U31A
Limited Stock
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Square D
400
480
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.