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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
HNG3W120L
HNG3W120L
Limited Stock
From
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Siemens
1200
600
HQR22B175HL
HQR22B175HL
Limited Stock
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Siemens
175
240
HQR22B175L
HQR22B175L
Limited Stock
From
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Siemens
175
240
HQR23B100HL
HQR23B100HL
Limited Stock
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Siemens
100
240
HQR23B100L
HQR23B100L
Limited Stock
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Siemens
100
240
HQR23B125L
HQR23B125L
Limited Stock
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Siemens
125
240
HQR23B150HL
HQR23B150HL
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Siemens
150
240
HQR23B175HL
HQR23B175HL
Limited Stock
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Siemens
175
240
HQR23B175L
HQR23B175L
Limited Stock
From
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Siemens
175
240
JXD22B250H
JXD22B250H
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Siemens
250
240
JXD22B250HL
JXD22B250HL
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Siemens
250
240
JXD22B400H
JXD22B400H
Limited Stock
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Siemens
400
240
JXD22B400HL
JXD22B400HL
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Siemens
400
240
JXD62B200H
JXD62B200H
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Siemens
200
600
JXD62B200HL
JXD62B200HL
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Siemens
200
600
JXD63B350HL
JXD63B350HL
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Siemens
350
600
JXD63B400HL
JXD63B400HL
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Siemens
400
600
LD63B400L
LD63B400L
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Siemens
400
600
LD63M250
LD63M250
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Siemens
250
600
LD63M250L
LD63M250L
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Siemens
250
600
LD63M300
LD63M300
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Siemens
300
600
LD63M300L
LD63M300L
Limited Stock
From
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Siemens
300
600
LD63M350
LD63M350
Limited Stock
From
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Siemens
350
600
LD63M350L
LD63M350L
Limited Stock
From
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Siemens
350
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.