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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
LGB3B025B
LGB3B025B
In Stock
From
$389.18
Siemens
25
600
LGB3B035B
LGB3B035B
In Stock
From
$541.86
Siemens
35
600
LGB3B040B
LGB3B040B
In Stock
From
$399.32
Siemens
40
600
LGB3B050B
LGB3B050B
In Stock
From
$402.64
Siemens
50
600
LGB3B060B
LGB3B060B
In Stock
From
$374.47
Siemens
60
600
LGB3B070B
LGB3B070B
In Stock
From
$410.13
Siemens
70
600
LGB3B080B
LGB3B080B
In Stock
From
$514.21
Siemens
80
600
LGB3B100B
LGB3B100B
In Stock
From
$357.16
Siemens
100
600
LGB3B110B
LGB3B110B
In Stock
From
$1,132.79
Siemens
110
600
LGB3B125B
LGB3B125B
In Stock
From
$642.67
Siemens
125
600
Q115
Q115
In Stock
From
$40.87
Siemens
15
120
Q220
Q220
In Stock
From
$16.30
Siemens
20
240
B11500S01
B11500S01
In Stock
From
$100.62
Siemens
15
240
B115H
B115H
In Stock
From
$21.80
Siemens
15
240
B12000S01
B12000S01
In Stock
From
$69.04
Siemens
20
240
B130
B130
In Stock
From
$8.22
Siemens
30
120
B2100
B2100
In Stock
From
$34.29
Siemens
100
240
B210000S01
B210000S01
In Stock
From
$130.24
Siemens
100
240
B2100H
B2100H
In Stock
From
$130.59
Siemens
100
240
B2100HH
B2100HH
In Stock
From
$143.50
Siemens
100
240
B230
B230
In Stock
From
$26.59
Siemens
30
240
B230HH
B230HH
In Stock
From
$86.00
Siemens
30
240
B240
B240
In Stock
From
$27.61
Siemens
40
240
B240H
B240H
In Stock
From
$43.06
Siemens
40
240
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.