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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
WLL1F320EU
WLL1F320EU
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2000
WLL1F320EW
WLL1F320EW
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2000
WLL1F320EY
WLL1F320EY
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2000
WLL1F320F
WLL1F320F
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2000
WLL1F320FA
WLL1F320FA
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2000
WLL1F320FB
WLL1F320FB
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2000
WLL1F320FC
WLL1F320FC
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2000
WLL1F320FD
WLL1F320FD
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2000
WLL1F320FE
WLL1F320FE
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2000
WLL1F320FF
WLL1F320FF
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2000
WLL1F320FG
WLL1F320FG
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2000
WLL1F320FH
WLL1F320FH
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2000
WLL1F320FJ
WLL1F320FJ
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2000
WLL1F320FK
WLL1F320FK
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2000
WLL1F320FL
WLL1F320FL
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2000
WLL1F320FN
WLL1F320FN
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2000
WLL1F320FP
WLL1F320FP
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2000
WLL1F320FQ
WLL1F320FQ
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Siemens
2000
WLL1F320FR
WLL1F320FR
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Siemens
2000
WLL1F320FT
WLL1F320FT
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Siemens
2000
WLL1F320FU
WLL1F320FU
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2000
WLL1F320FW
WLL1F320FW
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2000
WLL1F320FY
WLL1F320FY
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Siemens
2000
WLL1F320G
WLL1F320G
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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.