1. Home / 
  2. All Categories / 
  3. Circuit Breaker / 
  4. Molded Case Circuit Breaker

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.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
Voltage
KG3350S17
KG3350S17
Limited Stock
From
Get Price
Cutler Hammer
350
600
KG3350S18
KG3350S18
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S19
KG3350S19
Limited Stock
From
Get Price
Cutler Hammer
350
600
KG3350S20
KG3350S20
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S29
KG3350S29
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S30
KG3350S30
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S31
KG3350S31
Limited Stock
From
Get Price
Cutler Hammer
350
600
KG3350S32
KG3350S32
Limited Stock
From
Get Price
Eaton
350
600
KG3350S33
KG3350S33
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S34
KG3350S34
Limited Stock
From
Get Price
Cutler Hammer
350
600
KG3350S35
KG3350S35
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S36
KG3350S36
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S37
KG3350S37
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S38
KG3350S38
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S39
KG3350S39
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S40
KG3350S40
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S44
KG3350S44
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S48
KG3350S48
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S49
KG3350S49
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S50
KG3350S50
Limited Stock
From
Get Price
Eaton
350
600
KG3350S51
KG3350S51
Limited Stock
From
Get Price
Eaton
350
600
KG3350S52
KG3350S52
Limited Stock
From
Get Price
Cutler Hammer
350
600
KG3350S53
KG3350S53
Limited Stock
From
Get Price
Westinghouse
350
600
KG3350S54
KG3350S54
Limited Stock
From
Get Price
Westinghouse
350
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.