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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
ED43B090NAV
ED43B090NAV
Limited Stock
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Siemens
90
480
ED43B100NAV
ED43B100NAV
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Siemens
100
480
ED43B125NAV
ED43B125NAV
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From
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Siemens
125
480
ED61B015MX
ED61B015MX
Limited Stock
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Siemens
15
600
ED61B015NAV
ED61B015NAV
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Siemens
15
600
ED61B020MX
ED61B020MX
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Siemens
20
600
ED61B020NAV
ED61B020NAV
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Siemens
20
600
ED62B020MX
ED62B020MX
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Siemens
20
600
ED62B020NAV
ED62B020NAV
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Siemens
20
600
ED63B020MX
ED63B020MX
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Siemens
20
600
ED63B035MX
ED63B035MX
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Siemens
35
600
ED63B040MX
ED63B040MX
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Siemens
40
600
ED63B070MX
ED63B070MX
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Siemens
70
600
ED63B090MX
ED63B090MX
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Siemens
90
600
ED63B125MX
ED63B125MX
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Siemens
125
600
FD63B175NAV
FD63B175NAV
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Siemens
175
600
FXD63B070NAV
FXD63B070NAV
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Siemens
70
600
HEB1B025
HEB1B025
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Siemens
25
277
HEB1B025L
HEB1B025L
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Siemens
25
277
HEB2B030L
HEB2B030L
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Siemens
30
600
HEB2B040L
HEB2B040L
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Siemens
40
600
HEB2B100AST
HEB2B100AST
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From
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Siemens
100
600
HEB2B100L
HEB2B100L
Limited Stock
From
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Siemens
100
600
HEB3B040L
HEB3B040L
Limited Stock
From
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Siemens
40
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.