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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
5SY5206-7
5SY5206-7
Limited Stock
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Siemens
6
400
5SY5210-7
5SY5210-7
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Siemens
10
400
B170HH
B170HH
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Siemens
70
240
B360Y
B360Y
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Siemens
60
240
CLJ63B400
CLJ63B400
Limited Stock
From
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Siemens
400
600
HGB1B025B
HGB1B025B
Limited Stock
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Siemens
25
347
HGB1B035B
HGB1B035B
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Siemens
35
347
HJG3F400
HJG3F400
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Siemens
400
600
HPG3F160
HPG3F160
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Siemens
1600
600
LGB1B045B
LGB1B045B
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Siemens
45
347
LGB1B060B
LGB1B060B
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Siemens
60
347
LGB3K020
LGB3K020
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Siemens
20
600
LGG3B040
LGG3B040
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Siemens
40
600
LGG3B050
LGG3B050
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Siemens
50
600
MBK3150
MBK3150
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Siemens
150
240
MBK3200H
MBK3200H
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Siemens
200
240
MBK3225
MBK3225
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Siemens
225
240
Q120HM
Q120HM
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Siemens
20
120
Q150HH00S01
Q150HH00S01
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From
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Siemens
50
120
Q2100H00S07
Q2100H00S07
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Siemens
100
240
Q2125HH00S01
Q2125HH00S01
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Siemens
125
240
Q215HH00S01
Q215HH00S01
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From
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Siemens
15
240
Q25000S07
Q25000S07
Limited Stock
From
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Siemens
50
240
Q290H00S01
Q290H00S01
Limited Stock
From
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Siemens
90
240
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.