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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
BQ3100KM
BQ3100KM
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Murray Corporation
100
480
BQ315KM
BQ315KM
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Murray Corporation
15
480
BQ320KM
BQ320KM
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Murray Corporation
20
480
BQ325KM
BQ325KM
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Murray Corporation
25
480
BQ330KM
BQ330KM
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Murray Corporation
30
480
BQ335KM
BQ335KM
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Murray Corporation
35
480
BQ340KM
BQ340KM
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Murray Corporation
40
480
BQ345KM
BQ345KM
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Murray Corporation
45
480
BQ350KM
BQ350KM
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Murray Corporation
50
480
BQ360KM
BQ360KM
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Murray Corporation
60
480
BQ370KM
BQ370KM
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Murray Corporation
70
480
BQ380KM
BQ380KM
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Murray Corporation
80
480
BQ390KM
BQ390KM
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Murray Corporation
90
480
ED41100
ED41100
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Murray Corporation
100
480
ED4115
ED4115
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Murray Corporation
15
480
ED4125
ED4125
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Murray Corporation
25
480
ED4140
ED4140
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Murray Corporation
40
480
ED4150
ED4150
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Murray Corporation
50
480
ED4160
ED4160
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Murray Corporation
60
480
ED4170
ED4170
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Murray Corporation
70
480
ED4215
ED4215
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Murray Corporation
15
480
ED4220
ED4220
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Murray Corporation
20
480
ED4225
ED4225
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Murray Corporation
25
480
ED4230
ED4230
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Murray Corporation
30
480
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.