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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
Voltage
5SN3-320
5SN3-320
In Stock
From
$163.00
Siemens
-
5SN3303
5SN3303
In Stock
From
$92.92
Siemens
-
5SN3304
5SN3304
In Stock
From
$98.98
Siemens
-
5SN3305
5SN3305
Limited Stock
From
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Siemens
-
5SN3310-3
5SN3310-3
In Stock
From
$199.73
Siemens
-
5SN3G10A
5SN3G10A
Limited Stock
From
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Siemens
-
5SN7-102-0KB30
5SN7-102-0KB30
In Stock
From
$59.97
Siemens
-
5SN7G4A
5SN7G4A
In Stock
From
$12.84
Siemens
-
5SU1356-0KV32
5SU1356-0KV32
Limited Stock
From
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Siemens
400
5SZ221-7
5SZ221-7
In Stock
From
$29.59
Siemens
-
5SZ3 250-3A
5SZ3 250-3A
Limited Stock
From
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Siemens
-
5SZ3-423-7AA30
5SZ3-423-7AA30
In Stock
From
$51.02
Siemens
-
5SZ3-466-0KA30
5SZ3-466-0KA30
In Stock
From
$41.90
Siemens
-
5SZ3227
5SZ3227
Limited Stock
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Siemens
-
5SZ4-440
5SZ4-440
Limited Stock
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Siemens
-
5SZ6-466-0KG00
5SZ6-466-0KG00
In Stock
From
$113.94
Siemens
-
5SZ6470
5SZ6470
Limited Stock
From
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Siemens
-
5TL1363-0
5TL1363-0
Limited Stock
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Siemens
-
5TT4102-0
5TT4102-0
Limited Stock
From
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Siemens
-
5TT57420
5TT57420
Limited Stock
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Siemens
-
5TT5800-2
5TT5800-2
Limited Stock
From
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Siemens
-
BL270
BL270
In Stock
From
$66.70
Siemens
-
BLH130
BLH130
In Stock
From
$28.44
Siemens
-
BQ2M015
BQ2M015
In Stock
From
$131.60
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.