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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
FM6B070TC2W
FM6B070TC2W
Limited Stock
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Siemens
70
600
FM6B090TC2W
FM6B090TC2W
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Siemens
90
600
FM6B100TC2W
FM6B100TC2W
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Siemens
100
600
FM6B125TC2W
FM6B125TC2W
Limited Stock
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Siemens
125
600
FM6B150MS1W
FM6B150MS1W
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Siemens
150
600
FM6B150MS2W
FM6B150MS2W
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Siemens
150
600
FM6B150MS3W
FM6B150MS3W
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Siemens
150
600
FM6B150TC2W
FM6B150TC2W
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Siemens
150
600
FM6B150TC3W
FM6B150TC3W
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Siemens
150
600
FM6B175TC2W
FM6B175TC2W
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Siemens
175
600
FM6B175TC3W
FM6B175TC3W
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Siemens
175
600
FM6B200TC3W
FM6B200TC3W
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Siemens
200
600
FM6B225TC2W
FM6B225TC2W
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Siemens
225
600
FM6B225TC3W
FM6B225TC3W
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Siemens
225
600
FM6B250MC2W
FM6B250MC2W
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Siemens
250
600
FM6B250MC3W
FM6B250MC3W
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From
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Siemens
250
600
FMKB070TC2W
FMKB070TC2W
Limited Stock
From
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Siemens
70
1000
FMKB070TW
FMKB070TW
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Siemens
70
1000
FMKB080TW
FMKB080TW
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Siemens
80
1000
FMKB090TC2W
FMKB090TC2W
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From
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Siemens
90
1000
FMKB090TW
FMKB090TW
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From
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Siemens
90
1000
FMKB100TC2W
FMKB100TC2W
Limited Stock
From
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Siemens
100
1000
FMKB100TW
FMKB100TW
Limited Stock
From
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Siemens
100
1000
FMKB125TC2W
FMKB125TC2W
Limited Stock
From
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Siemens
125
1000
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.