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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
5SX7/8
5SX7/8
In Stock
From
$52.52
Siemens
8
400
5SZ3-423-7AA30
5SZ3-423-7AA30
In Stock
From
$39.27
Siemens
-
-
5SZ4-440
5SZ4-440
Limited Stock
From
Get Price
Siemens
-
-
BL-350
BL-350
In Stock
From
$164.62
Siemens
-
-
BL215
BL215
In Stock
From
$40.47
Siemens
-
-
BL240
BL240
Limited Stock
From
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Siemens
-
-
BQ2B030QXBPG
BQ2B030QXBPG
In Stock
From
$113.41
Siemens
-
-
GMBC1
GMBC1
In Stock
From
$133.51
Siemens
-
-
HFR3S250
HFR3S250
In Stock
From
$2,657.20
Siemens
-
-
MM0406L1200ESC
MM0406L1200ESC
In Stock
From
$811.89
Siemens
-
-
Q115DFN
Q115DFN
In Stock
From
$72.06
Siemens
-
-
Q120M
Q120M
In Stock
From
$8.40
Siemens
-
-
QA120AFCNL
QA120AFCNL
In Stock
From
$63.68
Siemens
-
-
QA120AFCP
QA120AFCP
In Stock
From
$74.79
Siemens
-
-
QF120AN
QF120AN
In Stock
From
$41.25
Siemens
-
-
QG22000S01
QG22000S01
In Stock
From
$354.75
Siemens
-
-
31215GS
31215GS
In Stock
From
$21.26
Bulldog
15
240
3RV1063-7AL10
3RV1063-7AL10
In Stock
From
$990.10
Siemens
-
-
3RV1063-7DL10
3RV1063-7DL10
Limited Stock
From
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Siemens
-
-
3RV1121-0DA10
3RV1121-0DA10
In Stock
From
$107.58
Siemens
-
-
3RV1121-0EA10
3RV1121-0EA10
Limited Stock
From
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Siemens
-
-
3RV1121-0HA10
3RV1121-0HA10
Limited Stock
From
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Siemens
-
-
3RV1121-0JA10
3RV1121-0JA10
Limited Stock
From
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Siemens
-
-
3RV1121-0KA10
3RV1121-0KA10
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.