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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
WLS1D320RD
WLS1D320RD
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Siemens
2000
WLS1D320RE
WLS1D320RE
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Siemens
2000
WLS1D320RF
WLS1D320RF
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Siemens
2000
WLS1D320RG
WLS1D320RG
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Siemens
2000
WLS1D320RH
WLS1D320RH
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Siemens
2000
WLS1D320RJ
WLS1D320RJ
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Siemens
2000
WLS1D320RK
WLS1D320RK
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Siemens
2000
WLS1D320RL
WLS1D320RL
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Siemens
2000
WLS1D320RN
WLS1D320RN
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Siemens
2000
WLS1D320RP
WLS1D320RP
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Siemens
2000
WLS1D320RQ
WLS1D320RQ
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Siemens
2000
WLS1D320RR
WLS1D320RR
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Siemens
2000
WLS1D320RT
WLS1D320RT
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Siemens
2000
WLS1D320RU
WLS1D320RU
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Siemens
2000
WLS1D320RW
WLS1D320RW
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Siemens
2000
WLS1D320RY
WLS1D320RY
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Siemens
2000
WLS1D320T
WLS1D320T
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Siemens
2000
WLS1D320TD
WLS1D320TD
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Siemens
2000
WLS1D320TE
WLS1D320TE
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Siemens
2000
WLS1D320TF
WLS1D320TF
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Siemens
2000
WLS1D320TG
WLS1D320TG
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Siemens
2000
WLS1D320TH
WLS1D320TH
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Siemens
2000
WLS1D320TJ
WLS1D320TJ
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Siemens
2000
WLS1D320TK
WLS1D320TK
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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.