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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
NDG3P150B
NDG3P150B
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Siemens
150
600
NDG3P150L
NDG3P150L
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Siemens
150
600
NDG3U060
NDG3U060
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Siemens
60
600
NDG3U060B
NDG3U060B
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Siemens
60
600
NDG3U060L
NDG3U060L
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Siemens
60
600
NDG3U100
NDG3U100
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Siemens
100
600
NDG3U100B
NDG3U100B
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Siemens
100
600
NDG3U100L
NDG3U100L
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Siemens
100
600
NDG3U150
NDG3U150
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Siemens
150
600
NDG3U150B
NDG3U150B
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Siemens
150
600
NDG3U150L
NDG3U150L
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Siemens
150
600
NDG3X060
NDG3X060
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Siemens
60
600
NDG3X060B
NDG3X060B
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Siemens
60
600
NDG3X060L
NDG3X060L
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Siemens
60
600
NDG3X100
NDG3X100
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Siemens
100
600
NDG3X100B
NDG3X100B
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Siemens
100
600
NDG3X100L
NDG3X100L
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Siemens
100
600
NDG3X150
NDG3X150
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Siemens
150
600
NDG3X150B
NDG3X150B
Limited Stock
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Siemens
150
600
NDG3X150L
NDG3X150L
Limited Stock
From
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Siemens
150
600
NDG4B050
NDG4B050
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Siemens
50
600
NDG4B050B
NDG4B050B
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Siemens
50
600
NDG4B050L
NDG4B050L
Limited Stock
From
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Siemens
50
600
NDG4B060
NDG4B060
Limited Stock
From
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Siemens
60
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.