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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
SEF362500LSAMRZ
SEF362500LSAMRZ
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Square D
2500
SEF362500LSET1A4
SEF362500LSET1A4
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Square D
2500
SEF362500LSGMRZ
SEF362500LSGMRZ
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Schneider Electric
2500
SEF363000LSAMRZ
SEF363000LSAMRZ
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Square D
3000
SEF363000LSET1A4
SEF363000LSET1A4
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Square D
3000
SEF364000LIGES1E8Z
SEF364000LIGES1E8Z
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Schneider Electric
4000
SEF36400LSAMRZ
SEF36400LSAMRZ
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Schneider Electric
400
SEF36400LSGMRZ
SEF36400LSGMRZ
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Square D
400
SEF36800LSAMRZ
SEF36800LSAMRZ
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Square D
800
SEF36800LSGMRZ
SEF36800LSGMRZ
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Schneider Electric
800
SEF40A2
SEF40A2
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Schneider Electric
4000
SEF40A4
SEF40A4
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Square D
4000
SEF40A8
SEF40A8
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Schneider Electric
4000
SEF40DUMMY
SEF40DUMMY
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Schneider Electric
4000
SEF40E1C1S1
SEF40E1C1S1
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Schneider Electric
4000
SEF40E1C1S1M2
SEF40E1C1S1M2
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Schneider Electric
4000
SEF40M2
SEF40M2
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Schneider Electric
4000
SEF40S1XA
SEF40S1XA
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Square D
4000
NW20HADCD-PV-UL
NW20HADCD-PV-UL
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Square D
2000
SEDG04
SEDG04
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Square D
400
SEDG04A2
SEDG04A2
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Square D
400
SEDG04A4
SEDG04A4
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Square D
400
SEDG04A8
SEDG04A8
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Square D
400
SEDG04E1C1S1
SEDG04E1C1S1
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Schneider Electric
400

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.