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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
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Manufacturer
Amperage
Voltage
1B20UR
1B20UR
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Altech Corp
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1B30UM
1B30UM
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Altech Corp
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-
1C-2.5UM
1C-2.5UM
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Altech Corp
2.5
277
1C1-6UM
1C1-6UM
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Altech Corp
1.6
480
1C20UR
1C20UR
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Altech Corp
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-
1C63UR
1C63UR
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Altech Corp
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1CU13L
1CU13L
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Altech Corp
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1CU1R
1CU1R
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Altech Corp
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1D05UM
1D05UM
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Altech Corp
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1D40DL
1D40DL
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Altech Corp
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1D4UL
1D4UL
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Altech Corp
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1D50UM
1D50UM
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Altech Corp
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1D5UM
1D5UM
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Altech Corp
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1DU10L
1DU10L
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Altech Corp
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1DU30
1DU30
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Altech Corp
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1DU4L
1DU4L
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Altech Corp
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-
1E2.5UM
1E2.5UM
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Altech Corp
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-
1E5UM
1E5UM
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Altech Corp
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1EU1.6
1EU1.6
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Altech Corp
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1EU10
1EU10
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Altech Corp
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1EU13
1EU13
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Altech Corp
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1EU20
1EU20
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Altech Corp
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1EU25
1EU25
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Altech Corp
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1EU5
1EU5
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Altech Corp
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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.