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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
AT35060
AT35060
In Stock
From
$206.51
Trumbull
60
600
AT31020
AT31020
In Stock
From
$21.99
Trumbull
20
240
AT31035
AT31035
In Stock
From
$38.29
Trumbull
35
240
AT32015
AT32015
In Stock
From
$13.78
Trumbull
15
250
AT32020
AT32020
In Stock
From
$6.65
Trumbull
20
250
AT32030
AT32030
In Stock
From
$57.10
Trumbull
30
250
ATB32100
ATB32100
In Stock
From
$270.55
Trumbull
100
240
ATB36030
ATB36030
In Stock
From
$92.75
Trumbull
30
600
AT21030
AT21030
In Stock
From
$115.32
Trumbull
30
240
AT21035
AT21035
Limited Stock
From
Get Price
Trumbull
35
240
AT31015
AT31015
In Stock
From
$439.06
Trumbull
15
240
AT31025
AT31025
In Stock
From
$144.14
Trumbull
25
240
AT31040
AT31040
In Stock
From
$66.79
Trumbull
40
240
AT31050
AT31050
In Stock
From
$92.20
Trumbull
50
240
AT32040
AT32040
In Stock
From
$0.02
Trumbull
40
250
AT39150
AT39150
In Stock
From
$335.65
Trumbull
150
600
ATB32015
ATB32015
In Stock
From
$454.50
Trumbull
15
240
ATB32030
ATB32030
In Stock
From
$477.12
Trumbull
30
240
ATB36015
ATB36015
In Stock
From
$188.15
Trumbull
15
600
ATB36020
ATB36020
In Stock
From
$367.40
Trumbull
20
600
ATB36040
ATB36040
Limited Stock
From
Get Price
Trumbull
40
600
ATB36070
ATB36070
In Stock
From
$304.70
Trumbull
70
600
ATF37125
ATF37125
In Stock
From
$256.04
Trumbull
125
240
ATF37150
ATF37150
In Stock
From
$273.97
Trumbull
150
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.