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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
SHJD6B200LSI
SHJD6B200LSI
In Stock
From
$4,574.45
Siemens
200
600
SHJD6B200LSIG
SHJD6B200LSIG
In Stock
From
$8,875.69
Siemens
200
600
SHJD6B300LSIG
SHJD6B300LSIG
In Stock
From
$10,152.65
Siemens
300
600
SHJD6B300LSIGH
SHJD6B300LSIGH
In Stock
From
$9,011.08
Siemens
300
600
SHJD6B400LSIG
SHJD6B400LSIG
In Stock
From
$8,617.52
Siemens
400
600
SHKF3B100
SHKF3B100
In Stock
From
$2.29
Siemens
100
600
SHKF3B100G
SHKF3B100G
In Stock
From
$214.82
Siemens
100
600
SHP3B160G05
SHP3B160G05
In Stock
From
$555.56
Siemens
1600
600
SJD6B200LSIG
SJD6B200LSIG
Limited Stock
From
Get Price
Siemens
200
600
SJD6B300LSI
SJD6B300LSI
In Stock
From
$3,246.28
Siemens
300
600
11200
11200
In Stock
From
$93.25
Siemens
100
240
3VA5570-7EC32-0AA0
3VA5570-7EC32-0AA0
In Stock
From
$2,471.22
Siemens
700
480
5SJ4102-8HG42
5SJ4102-8HG42
In Stock
From
$57.57
Siemens
2
277
5SJ4318-7HG42
5SJ4318-7HG42
In Stock
From
$277.25
Siemens
18
277
B1520
B1520
In Stock
From
$176.12
Siemens
20
120
B220GF
B220GF
In Stock
From
$227.10
Siemens
20
240
B220GFHH
B220GFHH
In Stock
From
$343.10
Siemens
20
240
B230GFHH
B230GFHH
In Stock
From
$384.77
Siemens
30
240
B325GFHH
B325GFHH
In Stock
From
$2,483.36
Siemens
25
120
B340EGHH
B340EGHH
In Stock
From
$5,037.00
Siemens
40
120
EF2B150
EF2B150
In Stock
From
$571.67
Siemens
150
600
JKL3B400
JKL3B400
In Stock
From
$1,423.53
Siemens
400
600
K3B200
K3B200
In Stock
From
$861.26
ITE
200
600
KMB3B700
KMB3B700
In Stock
From
$83.07
Siemens
700
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.