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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
ITEQ330
ITEQ330
Limited Stock
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Siemens
30
240
ITEQ340
ITEQ340
Limited Stock
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Siemens
40
240
ITEQ350
ITEQ350
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ITE
50
240
ITEQ360
ITEQ360
Limited Stock
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Siemens
60
240
ITEQ370
ITEQ370
Limited Stock
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ITE
70
240
ITEQ380
ITEQ380
Limited Stock
From
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Siemens
80
240
ITEQ390
ITEQ390
Limited Stock
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ITE
90
240
ITEQF130A
ITEQF130A
Limited Stock
From
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Siemens
30
120
KL3B150
KL3B150
Limited Stock
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Siemens
150
600
KL3B200
KL3B200
Limited Stock
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Siemens
200
600
LGB3K040
LGB3K040
Limited Stock
From
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Siemens
40
600
LGG2B015
LGG2B015
Limited Stock
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Siemens
15
600
Q21000S01
Q21000S01
Limited Stock
From
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Siemens
10
240
Q2150
Q2150
Limited Stock
From
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Siemens
150
240
Q270H00S01
Q270H00S01
Limited Stock
From
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Siemens
70
240
QP140
QP140
Limited Stock
From
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Siemens
40
240
QPMH2200H
QPMH2200H
Limited Stock
From
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Siemens
200
240
3RV2311-1EC20
3RV2311-1EC20
Limited Stock
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Siemens
-
-
3VA2450-5MN32-0AA0
3VA2450-5MN32-0AA0
Limited Stock
From
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Siemens
-
-
3VA4170-6ED34-0AAO
3VA4170-6ED34-0AAO
Limited Stock
From
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Siemens
125
-
3VA5145-4ED31-0AA0
3VA5145-4ED31-0AA0
Limited Stock
From
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Siemens
-
-
3VA5220-5EC36-0AA0
3VA5220-5EC36-0AA0
Limited Stock
From
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Siemens
-
-
3VA5225-5ED36-0AA0
3VA5225-5ED36-0AA0
Limited Stock
From
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Siemens
-
-
3VA5320-6EC31-0AA0
3VA5320-6EC31-0AA0
Limited Stock
From
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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.