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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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SHD6G9391
SHD6G9391
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General Electric
4000
SHD6G9392
SHD6G9392
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4000
SHD6G939U
SHD6G939U
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4000
SHD6G939W
SHD6G939W
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4000
SHD6G9511
SHD6G9511
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4000
SHD6G9512
SHD6G9512
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General Electric
4000
SHD6G951U
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4000
SHD6G951W
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4000
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SHD6G9521
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4000
SHD6G9522
SHD6G9522
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4000
SHD6G952U
SHD6G952U
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General Electric
4000
SHD6G952W
SHD6G952W
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4000
SHD6G9531
SHD6G9531
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General Electric
4000
SHD6G9532
SHD6G9532
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General Electric
4000
SHD6G953U
SHD6G953U
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General Electric
4000
SHD6G953W
SHD6G953W
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General Electric
4000
SHD6G9541
SHD6G9541
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General Electric
4000
SHD6G9542
SHD6G9542
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General Electric
4000
SHD6G954U
SHD6G954U
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General Electric
4000
SHD6G954W
SHD6G954W
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General Electric
4000
SHD6G9561
SHD6G9561
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General Electric
4000
SHD6G9562
SHD6G9562
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General Electric
4000
SHD6G956U
SHD6G956U
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General Electric
4000
SHD6G956W
SHD6G956W
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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.