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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
QJ22B22500S07
QJ22B22500S07
Limited Stock
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Siemens
225
240
QJ22B22500S11
QJ22B22500S11
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Siemens
225
240
QPJ2150
QPJ2150
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Siemens
150
240
QPJ3175SAL
QPJ3175SAL
Limited Stock
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Siemens
175
240
QPM2150
QPM2150
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Siemens
150
240
SLD6B500LSI
SLD6B500LSI
Limited Stock
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Siemens
500
600
SLD6B600LI
SLD6B600LI
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Siemens
600
600
SLD6B600LSIG
SLD6B600LSIG
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Siemens
600
600
W275
W275
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Siemens
75
240
3VA2063-5HL32-0AA0
3VA2063-5HL32-0AA0
Limited Stock
From
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Siemens
-
-
3VA2116-7JP32-0AA0
3VA2116-7JP32-0AA0
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Siemens
-
-
3VA2163-5HN32-0AA0
3VA2163-5HN32-0AA0
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Siemens
-
-
3VA2325-5KP32-0AA0
3VA2325-5KP32-0AA0
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Siemens
-
-
3VA4125-5ED24-0AA0
3VA4125-5ED24-0AA0
Limited Stock
From
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Siemens
25
480
3VA5150-6EF31-0AA0
3VA5150-6EF31-0AA0
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Siemens
-
-
3VA5210-0BB31-0AA0
3VA5210-0BB31-0AA0
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Siemens
100
600
3VA5250-6ED31-0AA0
3VA5250-6ED31-0AA0
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Siemens
50
690
3VA5580-6EC36-0AA0
3VA5580-6EC36-0AA0
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From
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Siemens
-
-
3VA6225-6HN36-0AA0
3VA6225-6HN36-0AA0
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From
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Siemens
-
-
3VA6340-5HL31-2AA0
3VA6340-5HL31-2AA0
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From
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Siemens
400
600
3VA6340-5HL41-2AA0
3VA6340-5HL41-2AA0
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From
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Siemens
400
600
3VA6340-5HM31-2AA0
3VA6340-5HM31-2AA0
Limited Stock
From
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Siemens
400
600
3VA6340-5HM41-2AA0
3VA6340-5HM41-2AA0
Limited Stock
From
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Siemens
400
600
3VA6340-5HN31-2AA0
3VA6340-5HN31-2AA0
Limited Stock
From
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Siemens
400
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.