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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
HJG3B350
HJG3B350
Limited Stock
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Siemens
350
600
HJX3V400
HJX3V400
Limited Stock
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Siemens
400
600
HJXD63M200
HJXD63M200
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Siemens
200
600
HLK3G600
HLK3G600
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Siemens
600
600
HLK3T600
HLK3T600
Limited Stock
From
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Siemens
600
600
HLK3V600
HLK3V600
Limited Stock
From
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Siemens
600
600
HMG2F800
HMG2F800
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Siemens
800
600
HMG3F800
HMG3F800
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Siemens
800
600
HMX3A800
HMX3A800
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Siemens
800
600
HMX3B800L
HMX3B800L
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Siemens
800
600
HMX3G800
HMX3G800
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Siemens
800
600
HMX3T600
HMX3T600
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Siemens
600
600
HMX3T800L
HMX3T800L
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Siemens
800
600
HMX3U800
HMX3U800
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Siemens
800
600
HMX3V800
HMX3V800
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Siemens
800
600
HMY3B800
HMY3B800
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From
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Siemens
800
600
HNG3U120
HNG3U120
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From
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Siemens
1200
600
HNS3S120
HNS3S120
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Siemens
1200
600
HNY3B120
HNY3B120
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Siemens
1200
600
HPX3V160
HPX3V160
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Siemens
1600
600
HPXD63M160
HPXD63M160
Limited Stock
From
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Siemens
1600
600
HPY3B160
HPY3B160
Limited Stock
From
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Siemens
1600
600
HRXD63M200
HRXD63M200
Limited Stock
From
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Siemens
2000
600
JJ3F400
JJ3F400
Limited Stock
From
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ITE
400
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.