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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
NEG621050
NEG621050
Limited Stock
From
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Federal Pacific
50
600
NEG621060
NEG621060
Limited Stock
From
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Federal Pacific
60
600
NEG621070
NEG621070
Limited Stock
From
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Federal Pacific
70
600
NEG621080
NEG621080
Limited Stock
From
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Federal Pacific
80
600
NEG621090
NEG621090
Limited Stock
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Federal Pacific
90
600
NEG621100
NEG621100
Limited Stock
From
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Federal Pacific
100
600
NEJ221175
NEJ221175
Limited Stock
From
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Federal Pacific
175
240
NEJ221225NA
NEJ221225NA
Limited Stock
From
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Federal Pacific
225
240
NF-SF-3175
NF-SF-3175
Limited Stock
From
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Mitsubishi
175
600
NF-SF-3200
NF-SF-3200
Limited Stock
From
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Mitsubishi
200
600
NF-SF-3350
NF-SF-3350
Limited Stock
From
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Mitsubishi
350
600
NFJ431150
NFJ431150
Limited Stock
From
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FPE
150
480
NFSJ-3125
NFSJ-3125
Limited Stock
From
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Mitsubishi
125
600
NFSJ-3175
NFSJ-3175
Limited Stock
From
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Mitsubishi
175
600
NFSJ-3200
NFSJ-3200
Limited Stock
From
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Mitsubishi
200
600
NFSK-3350
NFSK-3350
Limited Stock
From
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Mitsubishi
200
600
NGB2K015
NGB2K015
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From
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Siemens
15
600
NGB2K020
NGB2K020
Limited Stock
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Siemens
20
600
NGB2K025
NGB2K025
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Siemens
25
600
NGB2K030
NGB2K030
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From
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Siemens
30
600
NGB2K035
NGB2K035
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From
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Siemens
35
600
NGB2K040
NGB2K040
Limited Stock
From
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Siemens
40
600
NGB2K045
NGB2K045
Limited Stock
From
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Siemens
45
600
NGB2K050
NGB2K050
Limited Stock
From
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Siemens
50
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.