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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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Manufacturer
Amperage
WLL2D320BY
WLL2D320BY
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Siemens
2000
WLL2D320C
WLL2D320C
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Siemens
2000
WLL2D320CA
WLL2D320CA
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Siemens
2000
WLL2D320CB
WLL2D320CB
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Siemens
2000
WLL2D320CC
WLL2D320CC
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Siemens
2000
WLL2D320CD
WLL2D320CD
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Siemens
2000
WLL2D320CE
WLL2D320CE
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Siemens
2000
WLL2D320CF
WLL2D320CF
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Siemens
2000
WLL2D320CG
WLL2D320CG
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Siemens
2000
WLL2D320CH
WLL2D320CH
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Siemens
2000
WLL2D320CJ
WLL2D320CJ
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Siemens
2000
WLL2D320CK
WLL2D320CK
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Siemens
2000
WLL2D320CL
WLL2D320CL
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Siemens
2000
WLL2D320CN
WLL2D320CN
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Siemens
2000
WLL2D320CP
WLL2D320CP
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Siemens
2000
WLL2D320CQ
WLL2D320CQ
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Siemens
2000
WLL2D320CR
WLL2D320CR
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Siemens
2000
WLL2D320CT
WLL2D320CT
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Siemens
2000
WLL2D320CU
WLL2D320CU
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Siemens
2000
WLL2D320CW
WLL2D320CW
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Siemens
2000
WLL2D320CY
WLL2D320CY
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Siemens
2000
WLL2D320D
WLL2D320D
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Siemens
2000
WLL2D320DA
WLL2D320DA
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Siemens
2000
WLL2D320DB
WLL2D320DB
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Siemens
2000

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.