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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
30734
30734
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Merlin Gerin
63
690
30735
30735
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Merlin Gerin
40
690
30740
30740
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Merlin Gerin
160
690
30741
30741
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Schneider Electric
125
690
30742
30742
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Merlin Gerin
100
690
30743
30743
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Schneider Electric
80
690
31400
31400
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Merlin Gerin
250
690
31403
31403
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Merlin Gerin
250
690
31405
31405
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Merlin Gerin
250
690
31406
31406
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Merlin Gerin
250
690
31408
31408
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Schneider Electric
250
690
31410
31410
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Schneider Electric
250
690
31720
31720
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Schneider Electric
250
690
31721
31721
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Schneider Electric
200
690
31722
31722
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Merlin Gerin
160
690
31723
31723
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Merlin Gerin
125
690
31724
31724
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Schneider Electric
100
690
31725
31725
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Merlin Gerin
80
690
31726
31726
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Merlin Gerin
63
690
31727
31727
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Merlin Gerin
40
690
31730
31730
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Schneider Electric
250
690
31731
31731
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Merlin Gerin
200
690
31732
31732
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Schneider Electric
160
690
31733
31733
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Schneider Electric
125
690
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.