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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
JD2M300
JD2M300
In Stock
From
$899.44
Siemens
-
-
LD63W500
LD63W500
In Stock
From
$4,966.02
Siemens
-
-
LGB2B025
LGB2B025
In Stock
From
$424.97
Siemens
-
-
LGB2B030
LGB2B030
In Stock
From
$424.97
Siemens
-
-
LGB2B035
LGB2B035
In Stock
From
$424.97
Siemens
-
-
LGB2B045
LGB2B045
In Stock
From
$254.98
Siemens
-
-
MBKJD1400A
MBKJD1400A
In Stock
From
$3,356.23
Siemens
-
-
MD-T2150
MD-T2150
In Stock
From
$76.80
Siemens
-
-
MFKE3
MFKE3
In Stock
From
$1,398.64
Siemens
-
-
MFKE4X3
MFKE4X3
In Stock
From
$2,276.93
Siemens
-
-
MPD200KM
MPD200KM
In Stock
From
$140.64
Siemens
-
-
MSKE1
MSKE1
In Stock
From
$9.01
Siemens
-
-
MXD62S800ALAF
MXD62S800ALAF
In Stock
From
$487.96
Siemens
-
-
NDK3B150
NDK3B150
In Stock
From
$4,712.89
Siemens
-
-
NFK3R250
NFK3R250
In Stock
From
$3,551.07
Siemens
-
-
NLK3B500
NLK3B500
In Stock
From
$4,688.50
Siemens
-
-
NLW3B500
NLW3B500
In Stock
From
$14,013.40
Siemens
-
-
P230A
P230A
In Stock
From
$253.15
Siemens
-
-
P4390
P4390
In Stock
From
$154.15
Siemens
-
-
PC2651
PC2651
In Stock
From
$120.59
Siemens
-
-
Q220EG
Q220EG
In Stock
From
$227.03
Siemens
20
240
QD250
QD250
In Stock
From
$38.99
Siemens
-
-
QF2-B015
QF2-B015
In Stock
From
$13.80
Siemens
-
-
QG22000S01
QG22000S01
In Stock
From
$365.54
Siemens
-
-
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.