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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
MBKQJ1175A
MBKQJ1175A
In Stock
From
$295.70
Siemens
-
-
MBKQJ1225A
MBKQJ1225A
In Stock
From
$889.17
Siemens
-
-
N2000
N2000
In Stock
From
$1,404.68
Siemens
-
-
NFK3B225L
NFK3B225L
In Stock
From
$2,771.20
Siemens
-
-
NFK3T250
NFK3T250
In Stock
From
$224.99
Siemens
-
-
3VA2040-5HM42-0AA0
3VA2040-5HM42-0AA0
Limited Stock
From
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Siemens
-
-
3VA4180-5ED34-1AA0
3VA4180-5ED34-1AA0
In Stock
From
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Siemens
80
480
3VA9303-0JF60
3VA9303-0JF60
In Stock
From
$318.11
Siemens
-
-
3VT8110-1AA03-0AA0
3VT8110-1AA03-0AA0
In Stock
From
$244.07
Siemens
-
-
5SV1316-3KK16
5SV1316-3KK16
Limited Stock
From
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Siemens
16
400
5SV1316-6KK06
5SV1316-6KK06
Limited Stock
From
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Siemens
6
400
5SV1316-6KK10
5SV1316-6KK10
Limited Stock
From
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Siemens
10
400
5SV1316-6KK16
5SV1316-6KK16
Limited Stock
From
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Siemens
16
400
5SV1316-7KK16
5SV1316-7KK16
Limited Stock
From
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Siemens
16
400
5SV3344-4
5SV3344-4
Limited Stock
From
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Siemens
44
400
5SV3346-4
5SV3346-4
Limited Stock
From
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Siemens
46
400
5SV6016-6KK16
5SV6016-6KK16
Limited Stock
From
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Siemens
16
400
5SX23
5SX23
In Stock
From
$53.38
Siemens
3
400
5SY1716-2
5SY1716-2
Limited Stock
From
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Siemens
16
400
5SY6101-7
5SY6101-7
In Stock
From
$37.54
Siemens
1
400
5SY6140-6
5SY6140-6
Limited Stock
From
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Siemens
40
400
5SY6213-7
5SY6213-7
In Stock
From
$86.86
Siemens
13
400
5SY7506-6
5SY7506-6
Limited Stock
From
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Siemens
6
400
5SY8106-7
5SY8106-7
Limited Stock
From
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Siemens
6
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.