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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
Q211000S07
Q211000S07
Limited Stock
From
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Siemens
110
240
QD3-B030
QD3-B030
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ITE
30
240
QD3-B050
QD3-B050
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ITE
50
240
QD3-B060
QD3-B060
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ITE
60
240
QD3-B070
QD3-B070
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ITE
70
240
QF1B030
QF1B030
Limited Stock
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Siemens
30
120
QF23030
QF23030
Limited Stock
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Siemens
30
240
QP120AF
QP120AF
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ITE
20
240
QP150
QP150
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Siemens
50
240
QP160
QP160
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Siemens
60
240
3RV2321-4CC10
3RV2321-4CC10
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Siemens
-
-
3VA5215-6EC36-0AA0
3VA5215-6EC36-0AA0
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Siemens
-
-
5SX22C32
5SX22C32
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Siemens
32
400
5SX23-D3
5SX23-D3
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Siemens
3
400
5SY4214-7
5SY4214-7
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Siemens
-
-
5SY4632-6
5SY4632-6
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Siemens
-
-
3VA1340-5EF42-0AA0
3VA1340-5EF42-0AA0
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Siemens
-
-
3VA2325-5JQ42-0AA0
3VA2325-5JQ42-0AA0
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Siemens
-
-
3VA52125EC310AA0
3VA52125EC310AA0
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Siemens
-
-
3VA9477-0GF20
3VA9477-0GF20
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Siemens
-
-
5SV3642-8
5SV3642-8
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From
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Siemens
42
400
5SV6016-7KK16
5SV6016-7KK16
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From
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Siemens
-
-
5SV8900-1KK
5SV8900-1KK
Limited Stock
From
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Siemens
1
400
5SX22-3-8
5SX22-3-8
Limited Stock
From
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Siemens
3
400
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.