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Insulated Case Circuit Breaker

For circuit breaker applications in commercial and industrial power distribution systems, insulated case circuit breakers are among the most critical components for reliable overcurrent protection and system safety. Insulated case circuit breakers provide adjustable trip settings and high interrupting capacity while offering compact installation in panelboards and switchboards. Electrical.com carries an extensive selection of insulated 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, industrial facilities, data centers, and healthcare infrastructure applications.
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Part Number
PRICE
Manufacturer
Amperage
SEF16M2
SEF16M2
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Schneider Electric
1600
SEF16M2S1XA
SEF16M2S1XA
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Schneider Electric
1600
SEF18
SEF18
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Square D
1800
SEF18A2
SEF18A2
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Schneider Electric
1800
SEF18A4
SEF18A4
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Schneider Electric
1800
SEF18A8
SEF18A8
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Schneider Electric
1800
SEF18E1C1S1
SEF18E1C1S1
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Schneider Electric
1800
SEF18E1C1S1M2
SEF18E1C1S1M2
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Schneider Electric
1800
SEF18M2
SEF18M2
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Square D
1800
SEF18S1XA
SEF18S1XA
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Square D
1800
SEF20
SEF20
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Square D
2000
SEF205920LIT
SEF205920LIT
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Schneider Electric
2000
SEF20592LIT
SEF20592LIT
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Schneider Electric
2000
SEF20A2
SEF20A2
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Square D
2000
SEF20A4
SEF20A4
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Schneider Electric
2000
SEF20A8
SEF20A8
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Schneider Electric
2000
SEF20E1C1S1
SEF20E1C1S1
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Schneider Electric
2000
SEF20E1C1S1M2
SEF20E1C1S1M2
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Square D
2000
SEF20M2
SEF20M2
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Schneider Electric
2000
SEF20S1XA
SEF20S1XA
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Square D
2000
SEF20VI54
SEF20VI54
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Square D
2000
SEF25
SEF25
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Square D
2500
SEF25A2
SEF25A2
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Square D
2500
SEF25A4
SEF25A4
Limited Stock
From
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Schneider Electric
2500

Electrical.com stocks the largest inventory of insulated case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified circuit breakers available for immediate shipment. From low voltage to medium voltage applications, we have the insulated case breakers you need when others say no. Our comprehensive insulated case circuit breaker inventory spans all amperage ratings, voltage classes, and frame sizes 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 insulated case circuit breakers serve critical applications across industrial power distribution systems, manufacturing facilities, commercial buildings, data centers, utility substations, process control installations, and heavy industrial equipment.


Whether you're maintaining legacy electrical systems with obsolete insulated case breaker models or sourcing current production breakers for new installations and upgrades, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need insulated 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.