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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
REF3H110
REF3H110
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Miami Breaker
110
600
REF3H110L
REF3H110L
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From
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Miami Breaker
110
600
REF3H125
REF3H125
Limited Stock
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Miami Breaker
125
600
REF3H125L
REF3H125L
Limited Stock
From
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Miami Breaker
125
600
REF3H150
REF3H150
Limited Stock
From
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Miami Breaker
150
600
REF3H150L
REF3H150L
Limited Stock
From
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Miami Breaker
150
600
REF3L003
REF3L003
Limited Stock
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Miami Breaker
3
600
REF3L003L
REF3L003L
Limited Stock
From
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Miami Breaker
3
600
REF3L005
REF3L005
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Miami Breaker
5
600
REF3L010
REF3L010
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Miami Breaker
10
600
REF3L010L
REF3L010L
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From
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Miami Breaker
10
600
REF3L015
REF3L015
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Miami Breaker
15
600
REF3L015L
REF3L015L
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Miami Breaker
15
600
REF3L020
REF3L020
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Miami Breaker
20
600
REF3L020L
REF3L020L
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Miami Breaker
20
600
REF3L025
REF3L025
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Miami Breaker
25
600
REF3L025L
REF3L025L
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Miami Breaker
25
600
REF3L030
REF3L030
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Miami Breaker
30
600
REF3L030L
REF3L030L
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Miami Breaker
30
600
REF3L035
REF3L035
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Miami Breaker
35
600
REF3L035L
REF3L035L
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From
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Miami Breaker
35
600
REF3L040
REF3L040
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From
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Miami Breaker
40
600
REF3L040L
REF3L040L
Limited Stock
From
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Miami Breaker
40
600
REF3L045
REF3L045
Limited Stock
From
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Miami Breaker
45
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.