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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
HKD4175
HKD4175
Limited Stock
From
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Westinghouse
175
600
HKD4175W
HKD4175W
Limited Stock
From
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Cutler Hammer
175
600
HKD4200
HKD4200
Limited Stock
From
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Westinghouse
200
600
HKD4200W
HKD4200W
Limited Stock
From
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Eaton
200
600
HKD4225
HKD4225
Limited Stock
From
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Cutler Hammer
225
600
HKD4225W
HKD4225W
Limited Stock
From
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Westinghouse
225
600
HKD4250
HKD4250
Limited Stock
From
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Westinghouse
250
600
HKD4250W
HKD4250W
Limited Stock
From
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Cutler Hammer
250
600
HKD4300
HKD4300
Limited Stock
From
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Westinghouse
300
600
HKD4300W
HKD4300W
Limited Stock
From
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Cutler Hammer
300
600
HKD4350
HKD4350
Limited Stock
From
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Eaton
350
600
HKD4350W
HKD4350W
Limited Stock
From
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Eaton
350
600
HKD4400W
HKD4400W
Limited Stock
From
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Cutler Hammer
400
600
KD4225WA13S10
KD4225WA13S10
Limited Stock
From
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Westinghouse
225
600
1072452
1072452
Limited Stock
From
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Westinghouse
15
120
1072453
1072453
Limited Stock
From
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Westinghouse
20
120
1072454
1072454
Limited Stock
From
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Westinghouse
25
120
1072455
1072455
Limited Stock
From
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Westinghouse
25
120
1072456
1072456
Limited Stock
From
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Westinghouse
50
120
1720776
1720776
Limited Stock
From
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Westinghouse
70
120
1720777
1720777
Limited Stock
From
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Westinghouse
90
120
2609D60G10
2609D60G10
Limited Stock
From
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Westinghouse
30
1000
314C531G27
314C531G27
Limited Stock
From
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Westinghouse
90
600
BA1020
BA1020
Limited Stock
From
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Westinghouse
20
240
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.