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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
LFX3B150
LFX3B150
Limited Stock
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Siemens
150
600
LFX3B150L
LFX3B150L
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Siemens
150
600
LFX3B175
LFX3B175
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Siemens
175
600
LFX3B175L
LFX3B175L
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Siemens
175
600
LFX3B200
LFX3B200
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Siemens
200
600
LFX3B200L
LFX3B200L
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Siemens
200
600
LFX3B225
LFX3B225
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Siemens
225
600
LFX3B225L
LFX3B225L
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Siemens
225
600
LFX3B250L
LFX3B250L
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Siemens
250
600
LFX3G100B
LFX3G100B
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Siemens
100
600
LFX3G100L
LFX3G100L
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Siemens
100
600
LFX3G150B
LFX3G150B
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Siemens
150
600
LFX3G150L
LFX3G150L
Limited Stock
From
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Siemens
150
600
LFX3G250B
LFX3G250B
Limited Stock
From
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Siemens
250
600
LFX3G250L
LFX3G250L
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From
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Siemens
250
600
LFX3K100
LFX3K100
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From
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Siemens
100
600
LFX3K100B
LFX3K100B
Limited Stock
From
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Siemens
100
600
LFX3K100L
LFX3K100L
Limited Stock
From
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Siemens
100
600
LFX3K150
LFX3K150
Limited Stock
From
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Siemens
150
600
LFX3K150B
LFX3K150B
Limited Stock
From
Get Price
Siemens
150
600
LFX3K150L
LFX3K150L
Limited Stock
From
Get Price
Siemens
150
600
LFX3K250
LFX3K250
Limited Stock
From
Get Price
Siemens
250
600
LFX3K250B
LFX3K250B
Limited Stock
From
Get Price
Siemens
250
600
LFX3K250L
LFX3K250L
Limited Stock
From
Get Price
Siemens
250
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.