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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
NGG1B035
NGG1B035
Limited Stock
From
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Siemens
35
347
NGG1B035L
NGG1B035L
Limited Stock
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Siemens
35
347
NGG1B040
NGG1B040
Limited Stock
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Siemens
40
347
NGG1B040L
NGG1B040L
Limited Stock
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Siemens
40
347
NGG1B050
NGG1B050
Limited Stock
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Siemens
50
347
NGG1B050L
NGG1B050L
Limited Stock
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Siemens
50
347
NGG1B060
NGG1B060
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Siemens
60
347
NGG1B060L
NGG1B060L
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Siemens
60
347
NGG1B070
NGG1B070
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Siemens
70
347
NGG1B070L
NGG1B070L
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Siemens
70
347
NGG1B080
NGG1B080
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Siemens
80
347
NGG1B090
NGG1B090
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Siemens
90
347
NGG1B100
NGG1B100
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Siemens
100
347
NGG1B100L
NGG1B100L
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Siemens
100
347
NGG1B110
NGG1B110
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Siemens
110
347
NGG1B110L
NGG1B110L
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Siemens
110
347
NGG1B125
NGG1B125
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Siemens
125
347
NGG1B125L
NGG1B125L
Limited Stock
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Siemens
125
347
Q115H00S01
Q115H00S01
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Siemens
15
120
Q115H00S07
Q115H00S07
Limited Stock
From
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Siemens
15
120
Q115H01
Q115H01
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From
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Siemens
15
120
Q130H00S01
Q130H00S01
Limited Stock
From
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Siemens
30
120
Q130H00S07
Q130H00S07
Limited Stock
From
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Siemens
30
120
Q135H00S01
Q135H00S01
Limited Stock
From
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Siemens
35
120
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.