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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
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Manufacturer
Amperage
Voltage
5SX23-D16
5SX23-D16
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16
400
5SY1704-4
5SY1704-4
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Siemens
4
400
5SY4130-7
5SY4130-7
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Siemens
-
-
5SY7213-6
5SY7213-6
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Siemens
13
400
5SY7220-6
5SY7220-6
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Siemens
20
400
5SY7225-6
5SY7225-6
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Siemens
25
400
5SY7232-6
5SY7232-6
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Siemens
32
400
HNX3X100
HNX3X100
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Siemens
-
-
LD63B800
LD63B800
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Siemens
800
600
NFK3B250L
NFK3B250L
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Siemens
-
-
SLG
SLG
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-
-
3RV2321-1JC10
3RV2321-1JC10
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-
-
3RV2331-4PC10
3RV2331-4PC10
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-
-
3VA52250BB310AA0
3VA52250BB310AA0
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-
-
3VF2213-0FC41-B016
3VF2213-0FC41-B016
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-
-
3VF2213-0FE41-B025
3VF2213-0FE41-B025
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Siemens
-
-
3VF2213-0FG41-B032
3VF2213-0FG41-B032
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-
-
3VF2213-0FJ41-B040
3VF2213-0FJ41-B040
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-
-
3VF2213-0FL41-B050
3VF2213-0FL41-B050
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-
-
3VF2213-0FN41-B063
3VF2213-0FN41-B063
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Siemens
-
-
3VF2213-0FQ41-B080
3VF2213-0FQ41-B080
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Siemens
-
-
3VF2213-0FS41-B100
3VF2213-0FS41-B100
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Siemens
-
-
3VF2214-0JJ41-B040
3VF2214-0JJ41-B040
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Siemens
-
-
3VF2214-0JN41-B063
3VF2214-0JN41-B063
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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.