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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
HMD63F800H
HMD63F800H
In Stock
From
$4,420.18
Siemens
800
600
HMG3R600L
HMG3R600L
In Stock
From
$5,612.92
Siemens
800
600
HMX3B600L
HMX3B600L
In Stock
From
$7,957.32
Siemens
600
600
HMX3P600
HMX3P600
In Stock
From
$8,791.43
Siemens
600
600
HMX3R800L
HMX3R800L
In Stock
From
$5,447.24
Siemens
800
600
HMX3T600L
HMX3T600L
In Stock
From
$6,747.81
Siemens
600
600
HMX3V800L
HMX3V800L
In Stock
From
$10,701.63
Siemens
800
600
HMXD62B500
HMXD62B500
In Stock
From
$1,318.81
Siemens
500
600
HMXD62B500L
HMXD62B500L
In Stock
From
$1,929.11
Siemens
500
600
HMXD62B600
HMXD62B600
In Stock
From
$5,047.23
Siemens
600
600
HMXD62B600L
HMXD62B600L
In Stock
From
$5,047.23
Siemens
600
600
HMXD62B700
HMXD62B700
In Stock
From
$1,348.67
Siemens
700
600
HMXD62B700L
HMXD62B700L
In Stock
From
$1,913.54
Siemens
700
600
HMXD62B800L
HMXD62B800L
In Stock
From
$1,692.92
Siemens
800
600
HMXD62F800H
HMXD62F800H
In Stock
From
$1,730.86
Siemens
800
600
HMXD63B500
HMXD63B500
In Stock
From
$5,059.55
Siemens
500
600
HMXD63B500H
HMXD63B500H
In Stock
From
$5,059.55
Siemens
500
600
HMXD63B600H
HMXD63B600H
In Stock
From
$4,351.14
Siemens
600
600
HMXD63B700H
HMXD63B700H
In Stock
From
$5,495.38
Siemens
700
600
HMXD63F800H
HMXD63F800H
In Stock
From
$4,420.18
Siemens
800
600
HMY3A800
HMY3A800
In Stock
From
$10,080.00
Siemens
800
600
HMY3E600
HMY3E600
In Stock
From
$5,236.06
Siemens
600
600
HMY3G600
HMY3G600
In Stock
From
$4,167.90
Siemens
600
600
HMY3T800
HMY3T800
Limited Stock
From
Get Price
Siemens
800
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.