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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
XM633700
XM633700
In Stock
From
$3,667.06
Federal Pacific
700
600
XM633800
XM633800
In Stock
From
$7,542.06
Federal Pacific
800
600
HF631020
HF631020
In Stock
From
$110.67
Federal Pacific
20
600
NB3P20-FLAT-TOP
NB3P20-FLAT-TOP
In Stock
From
$312.16
Federal Pacific
20
240
NB3P25-FLAT-TOP
NB3P25-FLAT-TOP
In Stock
From
$218.53
Federal Pacific
25
240
NEJ221150
NEJ221150
Limited Stock
From
Get Price
Federal Pacific
150
240
NF631100
NF631100
In Stock
From
$378.24
Federal Pacific
100
600
NFS325
NFS325
In Stock
From
$224.53
Federal Pacific
25
240
NFS340
NFS340
In Stock
From
$193.98
Federal Pacific
40
240
NFS4340
NFS4340
In Stock
From
$177.92
Federal Pacific
40
240
NJS6315
NJS6315
In Stock
From
$935.99
Federal Pacific
150
600
NJS6330
NJS6330
In Stock
From
$1,325.13
Federal Pacific
300
600
NK631200
NK631200
In Stock
From
$914.54
Federal Pacific
200
600
NQ112020
NQ112020
In Stock
From
$39.85
Federal Pacific
20
120
VPKUBIF2100N
VPKUBIF2100N
In Stock
From
$327.90
Connecticut Electric
100
240
3B100LB
3B100LB
In Stock
From
$201.58
FPE
100
240
NE111030
NE111030
In Stock
From
$57.26
American
30
120
NE111040
NE111040
In Stock
From
$0.13
American
40
120
NE111050
NE111050
In Stock
From
$39.16
Federal Pacific
50
120
NE221015
NE221015
In Stock
From
$162.18
Federal Pacific
15
240
NE221040
NE221040
In Stock
From
$206.89
Federal Pacific
40
240
CK31000N-4P
CK31000N-4P
In Stock
From
$3,420.15
Federal Pioneer
1000
600
CK3400N-4P
CK3400N-4P
In Stock
From
$3,312.69
Federal Horizon
400
600
CK3800N-4P
CK3800N-4P
In Stock
From
$3,341.97
Federal Pioneer
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.