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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
5SQ1-210-2
5SQ1-210-2
In Stock
From
$75.98
Siemens
2
230
5SQ11-220-L25
5SQ11-220-L25
Limited Stock
From
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Siemens
25
230
5SQ11-220-L32
5SQ11-220-L32
Limited Stock
From
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Siemens
32
230
5SQ13-G50A
5SQ13-G50A
Limited Stock
From
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Siemens
50
230
5SQ2-370-2YA40
5SQ2-370-2YA40
Limited Stock
From
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Siemens
40
230
5SQ2-370-2YA63
5SQ2-370-2YA63
Limited Stock
From
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Siemens
63
230
5SQ2104-7
5SQ2104-7
Limited Stock
From
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Siemens
7
230
5SQ2110-7
5SQ2110-7
In Stock
From
$7.22
Siemens
7
230
5SQ2170-0KA20
5SQ2170-0KA20
In Stock
From
$5.77
Siemens
20
230
5SQ2170-0KA32
5SQ2170-0KA32
Limited Stock
From
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Siemens
32
230
5SQ2170-2YA06
5SQ2170-2YA06
Limited Stock
From
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Siemens
6
230
5SQ21C2
5SQ21C2
In Stock
From
$11.97
Siemens
-
230
5SQ22107YA10
5SQ22107YA10
In Stock
From
$79.99
Siemens
10
230
5SQ2270-0KA02
5SQ2270-0KA02
Limited Stock
From
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Siemens
2
230
5SQ2270-0KA16
5SQ2270-0KA16
In Stock
From
$15.24
Siemens
16
230
5SQ2270-2YA08
5SQ2270-2YA08
Limited Stock
From
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Siemens
8
230
5SQ2270-2YA10
5SQ2270-2YA10
Limited Stock
From
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Siemens
10
230
5SQ2370-0KA06
5SQ2370-0KA06
Limited Stock
From
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Siemens
6
230
5SQ2370-0KA10
5SQ2370-0KA10
In Stock
From
$24.87
Siemens
10
230
5SQ2570-2YA01
5SQ2570-2YA01
Limited Stock
From
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Siemens
1
230
5SU1353-1KK20
5SU1353-1KK20
Limited Stock
From
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Siemens
20
400
5SU1354-7KK40
5SU1354-7KK40
Limited Stock
From
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Siemens
40
400
5SU1653-1KK25
5SU1653-1KK25
Limited Stock
From
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Siemens
25
400
5SU3122-0KK10
5SU3122-0KK10
Limited Stock
From
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Siemens
10
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.