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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
MEQ9685R
MEQ9685R
In Stock
From
$236.65
Siemens
-
-
MN6HPL
MN6HPL
In Stock
From
$68.79
Siemens
-
-
NF322DT
NF322DT
In Stock
From
$110.45
Siemens
-
-
NGSP120
NGSP120
In Stock
From
$645.66
Siemens
-
-
NNX3X120
NNX3X120
In Stock
From
$85.36
Siemens
1200
480
P130A
P130A
In Stock
From
$1.11
Siemens
-
-
QF220ACSA
QF220ACSA
In Stock
From
$234.94
Siemens
-
-
RLL3B500
RLL3B500
In Stock
From
$3,993.97
Siemens
-
-
SCJ
SCJ
In Stock
From
$748.40
Siemens
-
-
SHK3B500
SHK3B500
In Stock
From
$2.29
Siemens
-
-
5SJ4132-7HG42
5SJ4132-7HG42
In Stock
From
$86.86
Siemens
-
-
B120BP
B120BP
In Stock
From
$21.79
Siemens
-
-
3RV1721-0AD10
3RV1721-0AD10
Limited Stock
From
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Siemens
-
-
3RV2011-4AA10-0BA0
3RV2011-4AA10-0BA0
In Stock
From
$456.96
Siemens
-
-
3RV20211EA20
3RV20211EA20
In Stock
From
$132.87
Siemens
-
-
3RV2042-4KA10
3RV2042-4KA10
In Stock
From
$1,265.53
Siemens
-
-
3RV2331-4JC10
3RV2331-4JC10
Limited Stock
From
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Siemens
-
-
3RV2331-4XC10
3RV2331-4XC10
Limited Stock
From
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Siemens
-
-
3RV2411-0JA10
3RV2411-0JA10
Limited Stock
From
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Siemens
-
-
3RV2711-0DD10
3RV2711-0DD10
In Stock
From
$301.99
Siemens
-
-
3TW1EG30
3TW1EG30
In Stock
From
$115.07
Siemens
-
-
3VA1080-3ED42-0AA0
3VA1080-3ED42-0AA0
Limited Stock
From
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Siemens
-
-
3VA1116-4ED36-0AA0
3VA1116-4ED36-0AA0
Limited Stock
From
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Siemens
-
-
3VA1116-6EF46-0AA0
3VA1116-6EF46-0AA0
Limited Stock
From
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Siemens
-
-
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.