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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
NEB1M020B
NEB1M020B
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Siemens
20
277
NEB1M020L
NEB1M020L
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Siemens
20
277
NEB1M025
NEB1M025
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Siemens
25
277
NEB1M025B
NEB1M025B
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Siemens
25
277
NEB1M025L
NEB1M025L
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Siemens
25
277
NEB1M030
NEB1M030
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Siemens
30
277
NEB1M030B
NEB1M030B
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Siemens
30
277
NEB1M030L
NEB1M030L
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Siemens
30
277
NEB1M035
NEB1M035
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Siemens
35
277
NEB1M035B
NEB1M035B
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Siemens
35
277
NEB1M035L
NEB1M035L
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Siemens
35
277
NEB1M040
NEB1M040
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Siemens
40
277
NEB1M040B
NEB1M040B
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Siemens
40
277
NEB1M040L
NEB1M040L
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Siemens
40
277
NEB1M045
NEB1M045
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Siemens
45
277
NEB1M045B
NEB1M045B
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Siemens
45
277
NEB1M045L
NEB1M045L
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Siemens
45
277
NEB1M050
NEB1M050
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Siemens
50
277
NEB1M050B
NEB1M050B
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Siemens
50
277
NEB1M050L
NEB1M050L
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Siemens
50
277
NEB1M060
NEB1M060
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Siemens
60
277
NEB1M060B
NEB1M060B
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Siemens
60
277
NEB1M060L
NEB1M060L
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Siemens
60
277
NEB1M070
NEB1M070
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Siemens
70
277
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.