1. Home / 
  2. All Categories / 
  3. Circuit Breaker / 
  4. Molded Case Circuit Breaker

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
CND3800T56W
CND3800T56W
In Stock
From
$7,976.81
Cutler Hammer
800
600
CND3800T57W
CND3800T57W
In Stock
From
$1,327.12
Westinghouse
800
600
CND3800T57WPN
CND3800T57WPN
In Stock
From
$2,268.76
Eaton
800
600
CND3800T76W
CND3800T76W
In Stock
From
$5,772.60
Westinghouse
800
600
CND3800T77W
CND3800T77W
In Stock
From
$5,772.60
Westinghouse
800
600
CND412T32W
CND412T32W
In Stock
From
$11,560.31
Cutler Hammer
1200
600
CND63B100
CND63B100
In Stock
From
$3,200.86
Siemens
1000
600
CND63B120
CND63B120
In Stock
From
$4,940.00
Siemens
1200
600
CNDC2800T33W
CNDC2800T33W
In Stock
From
$8,732.80
Eaton
800
600
CNDC312T106W
CNDC312T106W
In Stock
From
$19,816.57
Westinghouse
1200
600
CNDC312T107W
CNDC312T107W
In Stock
From
$19,816.57
Westinghouse
1200
600
CNDC312T32W
CNDC312T32W
In Stock
From
$7,062.90
Eaton
1200
600
CNDC312T33W
CNDC312T33W
In Stock
From
$9,695.74
Eaton
1200
600
CNDC312T35W
CNDC312T35W
In Stock
From
$19,816.57
Westinghouse
1200
600
CNDC312T52W
CNDC312T52W
In Stock
From
$15,882.21
Westinghouse
1200
600
CNDC312T56W
CNDC312T56W
In Stock
From
$19,816.57
Westinghouse
1200
600
CNDC312T56WZGP
CNDC312T56WZGP
In Stock
From
$7,571.89
Eaton
1200
600
CNDC312T57W
CNDC312T57W
In Stock
From
$15,088.56
Westinghouse
1200
600
CNDC312T76W
CNDC312T76W
In Stock
From
$19,816.57
Westinghouse
1200
600
CNDC312T77W
CNDC312T77W
In Stock
From
$11,634.89
Eaton
1200
600
CNDC3800T106W
CNDC3800T106W
In Stock
From
$10,333.91
Cutler Hammer
800
600
CNDC3800T32W
CNDC3800T32W
In Stock
From
$11,697.91
Westinghouse
800
600
CNDC3800T33W
CNDC3800T33W
In Stock
From
$25,021.74
Eaton
800
600
CNDC3800T35W
CNDC3800T35W
In Stock
From
$8,122.43
Eaton
800
600
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.