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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
LNY3D120L
LNY3D120L
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Siemens
1200
600
LNY3D800
LNY3D800
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Siemens
800
600
LNY3D800B
LNY3D800B
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Siemens
800
600
LNY3D800L
LNY3D800L
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Siemens
800
600
LNY3E100
LNY3E100
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Siemens
1000
600
LNY3E100B
LNY3E100B
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Siemens
1000
600
LNY3E100L
LNY3E100L
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Siemens
1000
600
LNY3E120
LNY3E120
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Siemens
1200
600
LNY3E120B
LNY3E120B
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Siemens
1200
600
LNY3E120L
LNY3E120L
Limited Stock
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Siemens
1200
600
LNY3E800
LNY3E800
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Siemens
800
600
LNY3E800B
LNY3E800B
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Siemens
800
600
LNY3E800L
LNY3E800L
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Siemens
800
600
LNY4N100
LNY4N100
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Siemens
1000
600
LNY4N100B
LNY4N100B
Limited Stock
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Siemens
1000
600
LNY4N100L
LNY4N100L
Limited Stock
From
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Siemens
1000
600
LNY4N120
LNY4N120
Limited Stock
From
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Siemens
1200
600
LNY4N120B
LNY4N120B
Limited Stock
From
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Siemens
1200
600
LNY4N120L
LNY4N120L
Limited Stock
From
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Siemens
1200
600
LNY4N800
LNY4N800
Limited Stock
From
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Siemens
800
600
LNY4N800B
LNY4N800B
Limited Stock
From
Get Price
Siemens
800
600
LNY4N800L
LNY4N800L
Limited Stock
From
Get Price
Siemens
800
600
LNY4P100
LNY4P100
Limited Stock
From
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Siemens
1000
600
LNY4P100B
LNY4P100B
Limited Stock
From
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Siemens
1000
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.