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Circuit Breaker

For power distribution and electrical protection systems, circuit breakers are among the most critical components for safeguarding equipment, personnel, and facilities from electrical overloads and short circuits. Circuit breakers automatically interrupt electrical current flow when abnormal conditions are detected, protecting circuits from damage while allowing manual reset and continued operation. Electrical.com carries an extensive selection of 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
Amperage
Poles
MM6B800TW
MM6B800TW
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Siemens
800
3
MM6F800
MM6F800
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Siemens
800
3
MMKB500TC3W
MMKB500TC3W
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Siemens
500
3
MMKB500TW
MMKB500TW
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Siemens
500
3
MMKB600TC3W
MMKB600TC3W
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Siemens
600
3
MMKB600TW
MMKB600TW
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Siemens
600
3
MMKB700TC3W
MMKB700TC3W
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Siemens
700
3
MMKB700TW
MMKB700TW
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Siemens
700
3
MMKB800MC3W
MMKB800MC3W
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Siemens
800
3
MMKB800MS1W
MMKB800MS1W
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Siemens
800
3
MMKB800MS2W
MMKB800MS2W
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Siemens
800
3
MMKB800MS3W
MMKB800MS3W
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Siemens
800
3
MMKB800TC3W
MMKB800TC3W
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Siemens
800
3
MMKB800TC4W
MMKB800TC4W
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Siemens
800
3
MMKB800TW
MMKB800TW
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Siemens
800
3
MMKF800
MMKF800
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Siemens
800
3
MXD62B500
MXD62B500
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Siemens
500
2
MXD62B500H
MXD62B500H
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Siemens
500
2
MXD62B500HL
MXD62B500HL
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Siemens
500
2
MXD62B500L
MXD62B500L
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Siemens
500
2
MXD62B600H
MXD62B600H
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Siemens
600
2
MXD62B600HL
MXD62B600HL
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Siemens
600
2
MXD62B600L
MXD62B600L
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Siemens
600
2
MXD62B700H
MXD62B700H
Limited Stock
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Siemens
700
2
Popular Circuit Breaker Manufacturers

Electrical.com stocks the largest inventory of circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified circuit protection equipment available for immediate shipment. From residential to industrial applications, across all voltage and amperage ratings, we have what you need when others say no. Our comprehensive circuit breaker inventory spans all voltage classes, amperage ratings, and pole configurations 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 circuit breakers serve critical applications across manufacturing facilities, commercial buildings, data centers, healthcare facilities, utilities and power generation, industrial plants, residential construction, telecommunications infrastructure, and process control installations.


Whether you're maintaining legacy equipment with obsolete circuit breaker models or sourcing current production components for new electrical systems, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime and keep your operations running. Need 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.

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