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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
MS31M20
MS31M20
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General Electric
2000
MS31M20-A
MS31M20-A
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General Electric
2000
MS31M25
MS31M25
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General Electric
2500
MS31M25-A
MS31M25-A
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General Electric
2500
MS31W04
MS31W04
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General Electric
400
MS31W04-A
MS31W04-A
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General Electric
400
MS31W06-A
MS31W06-A
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General Electric
630
MS31W12-A
MS31W12-A
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General Electric
1250
MS31W20-A
MS31W20-A
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General Electric
2000
MS31W25-A
MS31W25-A
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General Electric
2500
MS32F20
MS32F20
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General Electric
2000
MS32F20-A
MS32F20-A
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From
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General Electric
2000
MS32F25
MS32F25
Limited Stock
From
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General Electric
2500
MS32F25-A
MS32F25-A
Limited Stock
From
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General Electric
2500
MS32F40
MS32F40
Limited Stock
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General Electric
4000
MS32F40-A
MS32F40-A
Limited Stock
From
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General Electric
4000
MS32M20
MS32M20
Limited Stock
From
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General Electric
2000
MS32M20-A
MS32M20-A
Limited Stock
From
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General Electric
2000
MS32M25
MS32M25
Limited Stock
From
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General Electric
2500
MS32M25-A
MS32M25-A
Limited Stock
From
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General Electric
2500
MS32M32
MS32M32
Limited Stock
From
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General Electric
3200
MS32M32-A
MS32M32-A
Limited Stock
From
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General Electric
3200
MS32M40
MS32M40
Limited Stock
From
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General Electric
4000
MS32M40-A
MS32M40-A
Limited Stock
From
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General Electric
4000

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.