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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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3VE1020-2H
3VE1020-2H
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3VE4-200-0CT00
3VE4-200-0CT00
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3VE4200-0CL00
3VE4200-0CL00
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3VE4200-0CM00
3VE4200-0CM00
In Stock
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$47.95
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3VE4200-8CQ00
3VE4200-8CQ00
In Stock
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$71.97
Siemens
3VE4200-8CT00
3VE4200-8CT00
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Siemens
3VE5201-0CT00
3VE5201-0CT00
In Stock
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$357.07
Siemens
3VF3111-5DN71-0AB1
3VF3111-5DN71-0AB1
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3VL3520-2KN33-0AA0
3VL3520-2KN33-0AA0
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3VN4200-0HT00
3VN4200-0HT00
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3VN4200-1HR00
3VN4200-1HR00
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3VN4200-1HS00
3VN4200-1HS00
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Siemens
3WN6331-0GB74-3HA1
3WN6331-0GB74-3HA1
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$5,543.10
Siemens
3WN6331-0GC74-1FA1
3WN6331-0GC74-1FA1
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$3,539.74
Siemens
3WN6561-0JB05-1BA1
3WN6561-0JB05-1BA1
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3WN6683-0KG58-1KA3-Z
3WN6683-0KG58-1KA3-Z
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Siemens
3WX3112-1JA00
3WX3112-1JA00
In Stock
From
$80.39
Siemens
5SJ4210-7HG42
5SJ4210-7HG42
In Stock
From
$172.00
Siemens
5SJ4211-8HG42
5SJ4211-8HG42
In Stock
From
$113.37
Siemens
5SJ4304-7HG42
5SJ4304-7HG42
In Stock
From
$85.59
Siemens
5SJ4304-8HG42
5SJ4304-8HG42
In Stock
From
$146.89
Siemens
5SN2310
5SN2310
In Stock
From
$85.34
Siemens
5SN3-3-1-6
5SN3-3-1-6
In Stock
From
$76.58
Siemens
5SN3-306
5SN3-306
In Stock
From
$96.87
Siemens
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.