Refine Results

In Stock

Applied Filters:

Molded Case Circuit Breaker

Subcategory

Molded Case Circuit Breaker

Manufacturers

All

Amperage

All

Voltage

All

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
MBKQJ3200	In Stock From $1,572^.14	Siemens	200	240
MBKQJ3225	In Stock From $921^.71	Siemens	225	240
MCP431550CRX	In Stock From $474^.16	Cutler Hammer	150	600
MDS3800F	In Stock From $1,303^.13	Eaton	800	600
MGN61303	In Stock From $36^.92	Square D	3	277
MGN61319	In Stock From $33^.71	Square D	10	480
MGN61328	In Stock From $67^.20	Square D	6	480
MGN61351	In Stock From $227^.33	Square D	8	480
MGN61354	In Stock From $65^.77	Square D	20	480
MGN61365	In Stock From $254^.50	Square D	20	480
MM1515	In Stock From $21^.46	Murray	15	120
MP21515	In Stock From $50^.85	Murray Corporation	15	240
MP23015	In Stock From $24^.63	Murray Corporation	30	240
MQ250	In Stock From $31^.12	Murray	50	240
MQJ2225KH	In Stock From $538^.75	Murray Corporation	225	240
MQJ280	In Stock From $51^.79	Murray Corporation	80	240
MQJ3100KH	In Stock From $1,209^.95	Murray Corporation	100	240
MQJ3200	In Stock From $477^.08	Murray Corporation	200	240
MQJ3200KL	In Stock From $762^.10	Murray Corporation	200	240
MS360800A	In Stock From $1,552^.50	Eaton	800	600
NA115	In Stock From $41^.66	Federal Pacific	15	120
NA120	In Stock From $13^.63	Federal Pacific	20	120
NA15	In Stock From $27^.47	American	15	120
NA1P15	In Stock From $24^.47	Federal Pacific	15	120

1
...
666
667
668
...
18,485

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.