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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
HNB2900V
HNB2900V
Limited Stock
From
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Westinghouse
900
600
HNB31000V
HNB31000V
Limited Stock
From
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Westinghouse
1000
600
HNB31200V
HNB31200V
Limited Stock
From
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Westinghouse
1200
600
HNB3700V
HNB3700V
Limited Stock
From
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Cutler Hammer
700
600
HNB3800V
HNB3800V
Limited Stock
From
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Westinghouse
800
600
HNB3900V
HNB3900V
Limited Stock
From
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Westinghouse
900
600
HNC21000M
HNC21000M
Limited Stock
From
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Westinghouse
1000
600
HNC21200FM
HNC21200FM
Limited Stock
From
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Westinghouse
1200
600
HNC21200M
HNC21200M
Limited Stock
From
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Westinghouse
1200
600
HNC2800M
HNC2800M
Limited Stock
From
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Westinghouse
800
600
HNC2900M
HNC2900M
Limited Stock
From
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Westinghouse
900
600
HNC31000
HNC31000
Limited Stock
From
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Westinghouse
1000
600
HNC31000M
HNC31000M
Limited Stock
From
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Westinghouse
1000
600
HNC31200M
HNC31200M
Limited Stock
From
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Westinghouse
1200
600
HNC3800
HNC3800
Limited Stock
From
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Westinghouse
800
600
HNC3800M
HNC3800M
Limited Stock
From
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Westinghouse
800
600
HNC3900M
HNC3900M
Limited Stock
From
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Westinghouse
900
600
HNCA21200F
HNCA21200F
Limited Stock
From
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Westinghouse
1200
600
HNCGA31200F
HNCGA31200F
Limited Stock
From
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Westinghouse
1200
600
JDC4125
JDC4125
Limited Stock
From
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Westinghouse
125
600
JDC4150
JDC4150
Limited Stock
From
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Eaton
150
600
JDC4175
JDC4175
Limited Stock
From
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Westinghouse
175
600
JDC4200
JDC4200
Limited Stock
From
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Westinghouse
200
600
JDC4225
JDC4225
Limited Stock
From
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Westinghouse
225
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.