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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
3CU4
3CU4
In Stock
From
$22.05
Altech Corp
3D10UL
3D10UL
In Stock
From
$123.39
Altech Corp
3D20UR
3D20UR
In Stock
From
$106.02
Altech Corp
3D30UL
3D30UL
In Stock
From
$118.52
Altech Corp
3D50UL
3D50UL
In Stock
From
$209.56
Altech Corp
3DU13R
3DU13R
In Stock
From
$81.82
Altech Corp
3DU15R
3DU15R
In Stock
From
$27.14
Altech Corp
3E15UM
3E15UM
In Stock
From
$206.24
Altech Corp
3G10UM
3G10UM
In Stock
From
$87.65
Altech Corp
3G2.5UM
3G2.5UM
In Stock
From
$61.61
Altech Corp
3G8UM
3G8UM
In Stock
From
$50.17
Altech Corp
MA10U
MA10U
In Stock
From
$78.16
Altech Corp
2D30UL
2D30UL
In Stock
From
$80.22
Altech Corp
3D30UR
3D30UR
In Stock
From
$119.93
Altech Corp
15.902U
15.902U
In Stock
From
$39.65
Altech Corp
15.907U
15.907U
In Stock
From
$67.82
Altech Corp
1B13UM
1B13UM
In Stock
From
$89.20
Altech Corp
1B20UR
1B20UR
In Stock
From
$20.20
Altech Corp
1B4UR
1B4UR
In Stock
From
$27.69
Altech Corp
1B8UM
1B8UM
In Stock
From
$15.72
Altech Corp
1C10DL
1C10DL
In Stock
From
$49.46
Altech Corp
1C20DL
1C20DL
In Stock
From
$75.92
Altech Corp
1C25UM
1C25UM
In Stock
From
$16.42
Altech Corp
1C30DL
1C30DL
In Stock
From
$75.47
Altech Corp
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.