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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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Amperage
WLL1F320RP
WLL1F320RP
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2000
WLL1F320RQ
WLL1F320RQ
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2000
WLL1F320RR
WLL1F320RR
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2000
WLL1F320RT
WLL1F320RT
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2000
WLL1F320RU
WLL1F320RU
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2000
WLL1F320RW
WLL1F320RW
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2000
WLL1F320RY
WLL1F320RY
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2000
WLL1F320T
WLL1F320T
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WLL1F320TA
WLL1F320TA
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2000
WLL1F320TB
WLL1F320TB
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2000
WLL1F320TC
WLL1F320TC
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2000
WLL1F320TD
WLL1F320TD
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2000
WLL1F320TE
WLL1F320TE
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2000
WLL1F320TF
WLL1F320TF
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2000
WLL1F320TG
WLL1F320TG
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2000
WLL1F320TH
WLL1F320TH
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2000
WLL1F320TJ
WLL1F320TJ
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2000
WLL1F320TK
WLL1F320TK
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2000
WLL1F320TL
WLL1F320TL
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2000
WLL1F320TN
WLL1F320TN
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2000
WLL1F320TP
WLL1F320TP
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2000
WLL1F320TQ
WLL1F320TQ
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2000
WLL1F320TR
WLL1F320TR
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Siemens
2000
WLL1F320TT
WLL1F320TT
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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.