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Square D Molded Case Circuit Breakers
Available673 products
Square D molded case circuit breakers have current-carrying parts, mechanisms, and trip devices that are contained in a molded case. In the event of an overcurrent, they interrupt the current to prevent electrical damage in high-power applications, like industrial control panels, commercial OEM, and electrical distribution equipment.
B-Frame Square D Molded Case Circuit Breakers
B-frame Square D molded case circuit breakers are rated up to 125A and interrupt excessive current flows to protect devices from electrical damage. They're used in industrial control panels, commercial OEM, electrical distribution equipment, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 1; 240V AC
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Number of Poles: 1; 277V AC
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Number of Poles: 1; 347V AC
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Number of Poles: 2; 277/480V AC
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Number of Poles: 2; 525V AC
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Number of Poles: 2; 690V AC
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Number of Poles: 3; 277/480V AC
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Number of Poles: 3; 525V AC
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Number of Poles: 3; 690V AC
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H-Frame Square D Molded Case Circuit Breakers
H-frame Square D molded case circuit breakers are rated up to 150A and 600VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in construction, oil and gas, control equipment panels, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 600V AC
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Number of Poles: 3; 600V AC
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Square D Molded Case Circuit Breakers for I-Line Panelboards
These Square D molded case circuit breakers plug into I-line panelboards to interrupt excessive current flows and protect devices from electrical damage. They are rated up to 125A and 347VAC/250VDC. They're used in control panels, OEM, electrical distribution equipment, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 240V AC
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Number of Poles: 2; 600V AC
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Number of Poles: 3; 240V AC
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Number of Poles: 3; 600V AC
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J-Frame Square D Molded Case Circuit Breakers
J-frame Square D molded case circuit breakers are rated up to 250A and 600VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in construction, oil and gas, marine, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 600V AC
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Number of Poles: 3; 600V AC
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LA-, LH-, Q4-Frame Square D Molded Case Circuit Breakers
LA-, LH-, and Q4-frame Square D molded case circuit breakers are rated up to 400A and 600VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in construction, control equipment panels, mining, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 240V AC
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Number of Poles: 2; 600V AC
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Number of Poles: 3; 240V AC
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Number of Poles: 3; 600V AC
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Q-Frame Square D Molded Case Circuit Breakers
Q-frame Square D molded case circuit breakers are rated up to 250A and 240VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in OEM commercial and industrial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 240V AC
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Number of Poles: 3; 240V AC
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M-Frame Square D Molded Case Circuit Breakers
M-frame Square D molded case circuit breakers are rated up to 800A and 600VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in construction, commercial buildings, oil and gas, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 600V AC
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Number of Poles: 3; 600V AC
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Square D Motor Circuit Protectors
Square D motor circuit protectors are rated up to 75A and 347VAC and interrupt excessive current flows to protect motor control centers from short circuits. They can be used with NEMA and IEC motor starters, overload relays, and contactors to offer more circuit protection. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 3; 600V AC
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P-Frame Molded Case Circuit Breakers
P-frame Square D molded case circuit breakers are rated up to 1200A and 600VAC and interrupt excessive current flows to protect devices from electrical damage. They're used in construction, commercial buildings, control and monitoring, and other industrial and commercial applications. Their current-carrying parts, mechanisms, and trip devices are contained in a molded case.
Number of Poles: 2; 600V AC
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Number of Poles: 3; 600V AC
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