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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
EF3M030L
EF3M030L
Limited Stock
From
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ITE
30
600
EF3M035
EF3M035
Limited Stock
From
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Siemens
35
600
EF3M035L
EF3M035L
Limited Stock
From
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Siemens
35
600
EF3M040
EF3M040
Limited Stock
From
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ITE
40
600
EF3M040L
EF3M040L
Limited Stock
From
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Siemens
40
600
EF3M045
EF3M045
Limited Stock
From
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ITE
45
600
EF3M045L
EF3M045L
Limited Stock
From
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ITE
45
600
EF3M050
EF3M050
Limited Stock
From
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Siemens
50
600
EF3M050L
EF3M050L
Limited Stock
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ITE
50
600
EF3M060
EF3M060
Limited Stock
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ITE
60
600
EF3M060L
EF3M060L
Limited Stock
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Siemens
60
600
EF3M070
EF3M070
Limited Stock
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ITE
70
600
EF3M070L
EF3M070L
Limited Stock
From
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ITE
70
600
EF3M080
EF3M080
Limited Stock
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ITE
80
600
EF3M080L
EF3M080L
Limited Stock
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ITE
80
600
EF3M090
EF3M090
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ITE
90
600
EF3M090L
EF3M090L
Limited Stock
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ITE
90
600
EF3M100
EF3M100
Limited Stock
From
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Siemens
100
600
EF3M100L
EF3M100L
Limited Stock
From
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ITE
100
600
EF3M110
EF3M110
Limited Stock
From
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Siemens
110
600
EF3M110L
EF3M110L
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From
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ITE
110
600
EF3M125
EF3M125
Limited Stock
From
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ITE
125
600
EF3M125L
EF3M125L
Limited Stock
From
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ITE
125
600
EF3M150
EF3M150
Limited Stock
From
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Siemens
150
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.