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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
HLMXD63M800L
HLMXD63M800L
Limited Stock
From
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Siemens
800
600
HLW3A400
HLW3A400
Limited Stock
From
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Siemens
400
600
HLW3A400L
HLW3A400L
Limited Stock
From
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Siemens
400
600
HLW3B400L
HLW3B400L
Limited Stock
From
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Siemens
400
600
HLW3B500L
HLW3B500L
Limited Stock
From
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Siemens
500
600
HLW3G400
HLW3G400
Limited Stock
From
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Siemens
400
600
HLW3G400L
HLW3G400L
Limited Stock
From
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Siemens
400
600
HLW3K400
HLW3K400
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From
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Siemens
400
600
HLW3K400L
HLW3K400L
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From
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Siemens
400
600
HLW3R400
HLW3R400
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From
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Siemens
400
600
HLW3R400L
HLW3R400L
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Siemens
400
600
HLW3T400
HLW3T400
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From
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Siemens
400
600
HLW3T400L
HLW3T400L
Limited Stock
From
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Siemens
400
600
HLW3V400
HLW3V400
Limited Stock
From
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Siemens
400
600
HLW3V400L
HLW3V400L
Limited Stock
From
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Siemens
400
600
HLW3W400
HLW3W400
Limited Stock
From
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Siemens
400
600
HLW3W400L
HLW3W400L
Limited Stock
From
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Siemens
400
600
HLXD62B250H
HLXD62B250H
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From
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Siemens
250
600
HLXD62B250LH
HLXD62B250LH
Limited Stock
From
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Siemens
250
600
HLXD62B300H
HLXD62B300H
Limited Stock
From
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Siemens
300
600
HLXD62B300LH
HLXD62B300LH
Limited Stock
From
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Siemens
300
600
HLXD62B350H
HLXD62B350H
Limited Stock
From
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Siemens
350
600
HLXD62B350LH
HLXD62B350LH
Limited Stock
From
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Siemens
350
600
HLXD62B400H
HLXD62B400H
Limited Stock
From
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Siemens
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.