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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.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
Voltage
5SM33420RC
5SM33420RC
In Stock
From
$130.19
Siemens
25
415
5SM36466KK01
5SM36466KK01
Limited Stock
From
Get Price
Siemens
63
400
5SN1-116
5SN1-116
In Stock
From
$28.57
Siemens
16
380
5SN1-N-G-2A
5SN1-N-G-2A
In Stock
From
$32.99
Siemens
2
380
5SN1-NG32A
5SN1-NG32A
In Stock
From
$47.64
Siemens
32
380
HJD63F600
HJD63F600
In Stock
From
$1,924.77
Siemens
-
-
Q115DFN
Q115DFN
In Stock
From
$65.78
Siemens
-
-
Q270P
Q270P
In Stock
From
$32.70
Siemens
-
-
QA120AFCNL
QA120AFCNL
In Stock
From
$63.68
Siemens
-
-
QA120AFCP
QA120AFCP
In Stock
From
$50.67
Siemens
-
-
31215GS
31215GS
In Stock
From
$20.52
Bulldog
15
240
3RV1121-4CA10
3RV1121-4CA10
In Stock
From
$156.69
Siemens
-
-
3RV1321-1CC10
3RV1321-1CC10
In Stock
From
$65.38
Siemens
-
-
3RV1321-1GC10
3RV1321-1GC10
In Stock
From
$81.52
Siemens
-
-
3RV1321-4AC10
3RV1321-4AC10
In Stock
From
$75.03
Siemens
16
690
3RV1321-4AH10
3RV1321-4AH10
Limited Stock
From
Get Price
Siemens
-
-
3RV1331-4DC10
3RV1331-4DC10
In Stock
From
$50.07
Siemens
-
-
3RV1331-4FC10
3RV1331-4FC10
In Stock
From
$137.95
Siemens
-
-
3RV1341-4HC10
3RV1341-4HC10
In Stock
From
$395.52
Siemens
-
-
3RV1341-4JC10
3RV1341-4JC10
In Stock
From
$421.60
Siemens
-
-
3RV1341-4MC10
3RV1341-4MC10
Limited Stock
From
Get Price
Siemens
-
-
3RV1421-0KA10
3RV1421-0KA10
In Stock
From
$183.82
Siemens
-
-
3RV1421-1AA10
3RV1421-1AA10
In Stock
From
$105.34
Siemens
-
-
3RV1421-1BA10
3RV1421-1BA10
In Stock
From
$71.41
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.