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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
HNH2C900B
HNH2C900B
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Siemens
900
600
HNH2C900L
HNH2C900L
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Siemens
900
600
HNH3B100
HNH3B100
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Siemens
1000
600
HNH3B100B
HNH3B100B
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Siemens
1000
600
HNH3B100L
HNH3B100L
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Siemens
1000
600
HNH3B120
HNH3B120
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Siemens
1200
600
HNH3B120B
HNH3B120B
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Siemens
1200
600
HNH3B120L
HNH3B120L
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Siemens
1200
600
HNH3B800
HNH3B800
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Siemens
800
600
HNH3B800B
HNH3B800B
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Siemens
800
600
HNH3B800L
HNH3B800L
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Siemens
800
600
HNH3B900
HNH3B900
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Siemens
900
600
HNH3B900B
HNH3B900B
Limited Stock
From
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Siemens
900
600
HNH3B900L
HNH3B900L
Limited Stock
From
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Siemens
900
600
HNH3C100
HNH3C100
Limited Stock
From
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Siemens
1000
600
HNH3C100B
HNH3C100B
Limited Stock
From
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Siemens
1000
600
HNH3C100L
HNH3C100L
Limited Stock
From
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Siemens
1000
600
HNH3C120
HNH3C120
Limited Stock
From
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Siemens
1200
600
HNH3C120B
HNH3C120B
Limited Stock
From
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Siemens
1200
600
HNH3C120L
HNH3C120L
Limited Stock
From
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Siemens
1200
600
HNH3C800
HNH3C800
Limited Stock
From
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Siemens
800
600
HNH3C800B
HNH3C800B
Limited Stock
From
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Siemens
800
600
HNH3C800L
HNH3C800L
Limited Stock
From
Get Price
Siemens
800
600
HNH3C900
HNH3C900
Limited Stock
From
Get Price
Siemens
900
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.