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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
5SY4213-8
5SY4213-8
In Stock
From
$69.12
Siemens
13
400
5SY4263-6
5SY4263-6
Limited Stock
From
Get Price
Siemens
63
400
5SY7104-8
5SY7104-8
Limited Stock
From
Get Price
Siemens
4
400
5SY7116-6
5SY7116-6
Limited Stock
From
Get Price
Siemens
16
400
5SY7310-6
5SY7310-6
Limited Stock
From
Get Price
Siemens
10
400
E43A050
E43A050
In Stock
From
$232.99
Siemens
-
-
ET1562
ET1562
In Stock
From
$159.26
Siemens
-
-
ET1575
ET1575
In Stock
From
$67.48
Siemens
-
-
ET4037
ET4037
In Stock
From
$84.55
Siemens
-
-
FD63W150
FD63W150
In Stock
From
$2,775.48
Siemens
-
-
FD63W175
FD63W175
In Stock
From
$2,765.38
Siemens
-
-
FHOEBO
FHOEBO
In Stock
From
$181.02
Siemens
-
-
HG261234
HG261234
In Stock
From
$61.51
Siemens
-
-
HLD62F600
HLD62F600
In Stock
From
$11,467.54
Siemens
-
-
LD63W600
LD63W600
In Stock
From
$5,781.17
Siemens
-
-
MBKQJ3175A
MBKQJ3175A
In Stock
From
$1,083.05
Siemens
-
-
MBKQJ3225A
MBKQJ3225A
In Stock
From
$1,881.79
Siemens
-
-
QG2-B015
QG2-B015
In Stock
From
$51.99
Siemens
-
-
TSLN3M
TSLN3M
In Stock
From
$264.02
Siemens
-
-
3VA4145-4ED14-0AA0
3VA4145-4ED14-0AA0
In Stock
From
$242.90
Siemens
45
277
3VA5790-6EC31-0AA0
3VA5790-6EC31-0AA0
In Stock
From
$10,395.20
Siemens
900
600
3VA6712-6HN31-2AA0
3VA6712-6HN31-2AA0
In Stock
From
$14,412.20
Siemens
1200
600
3VA6712-6HQ31-0AA0
3VA6712-6HQ31-0AA0
In Stock
From
$14,412.20
Siemens
1200
600
3VE420
3VE420
In Stock
From
$49.86
Siemens
25
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.