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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.
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Part Number
PRICE
Manufacturer
3RV1742-5DD10
3RV1742-5DD10
In Stock
From
$261.44
Siemens
3RV1742-5ED10
3RV1742-5ED10
In Stock
From
$96.09
Siemens
3RV1742-5FD10
3RV1742-5FD10
In Stock
From
$358.35
Siemens
3RV1742-5GD10
3RV1742-5GD10
In Stock
From
$1,291.09
Siemens
3RV1742-5HD10
3RV1742-5HD10
In Stock
From
$650.82
Siemens
3RV1742-5LD10
3RV1742-5LD10
In Stock
From
$667.89
Siemens
3RV1742-5QD10
3RV1742-5QD10
In Stock
From
$3,361.61
Siemens
3RV1821-0BD10
3RV1821-0BD10
Limited Stock
From
Get Price
Siemens
3RV1821-1BD10
3RV1821-1BD10
In Stock
From
$292.90
Siemens
3RV1821-1ED10
3RV1821-1ED10
Limited Stock
From
Get Price
Siemens
3RV1821-4AD10
3RV1821-4AD10
In Stock
From
$297.14
Siemens
3RV1902-1AB4
3RV1902-1AB4
In Stock
From
$157.84
Siemens
3RV1912-1CV0
3RV1912-1CV0
In Stock
From
$58.87
Siemens
3RV1923-4B
3RV1923-4B
In Stock
From
$51.51
Siemens
3RV1946-2C
3RV1946-2C
In Stock
From
$801.94
Siemens
3RV2111-0BA10
3RV2111-0BA10
In Stock
From
$259.14
Siemens
3RV2111-0DA10
3RV2111-0DA10
In Stock
From
$256.61
Siemens
3RV2111-0GA10
3RV2111-0GA10
In Stock
From
$95.81
Siemens
3RV2111-0JA10
3RV2111-0JA10
In Stock
From
$174.72
Siemens
3RV2121-4CA10
3RV2121-4CA10
In Stock
From
$234.37
Siemens
3RV2121-4DA10
3RV2121-4DA10
Limited Stock
From
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Siemens
3RV2131-4VA10
3RV2131-4VA10
In Stock
From
$316.77
Siemens
3RV2131-4WA10
3RV2131-4WA10
In Stock
From
$531.26
Siemens
3RV2311-0JC10
3RV2311-0JC10
Limited Stock
From
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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.