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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.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
Voltage
UBIZ0225
UBIZ0225
In Stock
From
$95.75
Connecticut Electric
25
240
UQFB-125
UQFB-125
In Stock
From
$322.36
Milbank
125
240
WMZS1B08
WMZS1B08
In Stock
From
$16.80
Eaton
8
480
WMZS2B20
WMZS2B20
In Stock
From
$60.74
Eaton
20
480
WMZS2C40
WMZS2C40
In Stock
From
$61.98
Eaton
40
480
WMZS3C16
WMZS3C16
In Stock
From
$53.06
Cutler Hammer
16
480
WMZS3C50
WMZS3C50
In Stock
From
$220.96
Eaton
50
480
WMZS3D32
WMZS3D32
In Stock
From
$42.00
Eaton
32
480
WMZT1C01
WMZT1C01
In Stock
From
$120.15
Eaton
1
480
WMZT1C02
WMZT1C02
In Stock
From
$84.57
Eaton
2
480
WMZT1C03
WMZT1C03
In Stock
From
$130.65
Eaton
3
480
WMZT1C04
WMZT1C04
In Stock
From
$121.80
Eaton
4
480
WMZT1C05
WMZT1C05
In Stock
From
$41.12
Eaton
5
480
WMZT1C08
WMZT1C08
In Stock
From
$86.59
Eaton
8
480
WMZT1C15
WMZT1C15
In Stock
From
$48.60
Eaton
15
480
WMZT1C20
WMZT1C20
In Stock
From
$108.47
Eaton
20
480
WMZT1D02
WMZT1D02
In Stock
From
$26.59
Eaton
2
480
WMZT1D05
WMZT1D05
In Stock
From
$15.36
Eaton
5
480
WMZT1D10
WMZT1D10
In Stock
From
$77.62
Eaton
10
480
WMZT1D15
WMZT1D15
In Stock
From
$49.84
Eaton
15
480
WMZT1D20
WMZT1D20
In Stock
From
$48.04
Eaton
20
480
WMZT2C20
WMZT2C20
In Stock
From
$49.00
Eaton
20
480
WMZT3C05
WMZT3C05
In Stock
From
$94.25
Eaton
5
480
WMZT3C10
WMZT3C10
In Stock
From
$95.20
Eaton
10
480
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.