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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
HB3B070M
HB3B070M
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Siemens
70
240
HB3B070QX
HB3B070QX
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Siemens
70
240
HB3B070Y
HB3B070Y
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Siemens
70
240
HB3B09000S07
HB3B09000S07
Limited Stock
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Siemens
90
240
HB3B09001
HB3B09001
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Siemens
90
240
HB3B090F
HB3B090F
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Siemens
90
240
HB3B090M
HB3B090M
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Siemens
90
240
HB3B090QX
HB3B090QX
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Siemens
90
240
HB3B090Y
HB3B090Y
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Siemens
90
240
HDM3M150L
HDM3M150L
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Siemens
150
600
HFK3B225L
HFK3B225L
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Siemens
225
600
HGB3K125
HGB3K125
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Siemens
125
600
NGB1B015L
NGB1B015L
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Siemens
15
347
NGB1B015V
NGB1B015V
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Siemens
15
347
NGB1B020L
NGB1B020L
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Siemens
20
347
NGB1B025L
NGB1B025L
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Siemens
25
347
NGB1B025V
NGB1B025V
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Siemens
25
347
NGB1B030L
NGB1B030L
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Siemens
30
347
NGB1B030V
NGB1B030V
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Siemens
30
347
NGB1B035
NGB1B035
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Siemens
35
347
NGB1B035L
NGB1B035L
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Siemens
35
347
NGB1B035V
NGB1B035V
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From
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Siemens
35
347
NGB1B040
NGB1B040
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From
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Siemens
40
347
NGB1B040L
NGB1B040L
Limited Stock
From
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Siemens
40
347
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.