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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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Manufacturer
M9F12102
M9F12102
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Schneider Electric
M9F12210
M9F12210
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Schneider Electric
M9F12220
M9F12220
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Schneider Electric
M9F12232
M9F12232
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Schneider Electric
M9F12325
M9F12325
Limited Stock
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Schneider Electric
M9F21106
M9F21106
In Stock
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$115.00
Schneider Electric
M9F21202
M9F21202
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Schneider Electric
M9F21210
M9F21210
In Stock
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$192.91
Schneider Electric
M9F22105
M9F22105
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Schneider Electric
M9F22201
M9F22201
In Stock
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$78.43
Schneider Electric
M9F23106
M9F23106
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Schneider Electric
M9F23420
M9F23420
In Stock
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$404.62
Schneider Electric
M9F44105
M9F44105
In Stock
From
$89.69
Schneider Electric
M9U21201
M9U21201
In Stock
From
$270.61
Schneider Electric
MA11125
MA11125
In Stock
From
$111.11
Square D
MA360008
MA360008
In Stock
From
$2,553.85
Schneider Electric
MEC436LSIG
MEC436LSIG
In Stock
From
$408.84
Schneider Electric
MG18262
MG18262
In Stock
From
$46.51
Schneider Electric
MG18289
MG18289
In Stock
From
$61.09
Schneider Electric
MG18291
MG18291
In Stock
From
$422.19
Schneider Electric
MG19753
MG19753
In Stock
From
$46.42
Schneider Electric
MG20230
MG20230
In Stock
From
$63.55
Schneider Electric
MG20235
MG20235
In Stock
From
$70.04
Schneider Electric
MG20420
MG20420
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Schneider Electric
Popular Molded Case Circuit Breaker Manufacturers
Eaton
Square D
ABB
Siemens

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.