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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
REF3B045
REF3B045
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Miami Breaker
45
600
REF3B045L
REF3B045L
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From
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Miami Breaker
45
600
REF3B050L
REF3B050L
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From
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Miami Breaker
50
600
REF3B060L
REF3B060L
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Miami Breaker
60
600
REF3B070
REF3B070
Limited Stock
From
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Miami Breaker
70
600
REF3B070L
REF3B070L
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From
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Miami Breaker
70
600
REF3B080
REF3B080
Limited Stock
From
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Miami Breaker
80
600
REF3B080L
REF3B080L
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Miami Breaker
80
600
REF3B090
REF3B090
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Miami Breaker
90
600
REF3B090L
REF3B090L
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Miami Breaker
90
600
REF3B100L
REF3B100L
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Miami Breaker
100
600
REF3B110L
REF3B110L
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Miami Breaker
110
600
REF3B125
REF3B125
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Miami Breaker
125
600
REF3B125L
REF3B125L
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Miami Breaker
125
600
REF3B150
REF3B150
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Miami Breaker
150
600
REF3B150L
REF3B150L
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Miami Breaker
150
600
REF3H003
REF3H003
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Miami Breaker
3
600
REF3H003L
REF3H003L
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From
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Miami Breaker
3
600
REF3H005
REF3H005
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Miami Breaker
5
600
REF3H005L
REF3H005L
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Miami Breaker
5
600
REF3H010
REF3H010
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Miami Breaker
10
600
REF3H010L
REF3H010L
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From
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Miami Breaker
10
600
REF3H015
REF3H015
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From
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Miami Breaker
15
600
REF3H015L
REF3H015L
Limited Stock
From
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Miami Breaker
15
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.