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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
WLS1F320LJ
WLS1F320LJ
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2000
WLS1F320LK
WLS1F320LK
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2000
WLS1F320LL
WLS1F320LL
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2000
WLS1F320LN
WLS1F320LN
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2000
WLS1F320LP
WLS1F320LP
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2000
WLS1F320LQ
WLS1F320LQ
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2000
WLS1F320LR
WLS1F320LR
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2000
WLS1F320LT
WLS1F320LT
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2000
WLS1F320LU
WLS1F320LU
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2000
WLS1F320LW
WLS1F320LW
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2000
WLS1F320LY
WLS1F320LY
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2000
WLS1F320M
WLS1F320M
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2000
WLS1F320MA
WLS1F320MA
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2000
WLS1F320MB
WLS1F320MB
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2000
WLS1F320MC
WLS1F320MC
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2000
WLS1F320MD
WLS1F320MD
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Siemens
2000
WLS1F320ME
WLS1F320ME
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2000
WLS1F320MF
WLS1F320MF
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Siemens
2000
WLS1F320MG
WLS1F320MG
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Siemens
2000
WLS1F320MH
WLS1F320MH
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Siemens
2000
WLS1F320MJ
WLS1F320MJ
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Siemens
2000
WLS1F320MK
WLS1F320MK
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2000
WLS1F320ML
WLS1F320ML
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Siemens
2000
WLS1F320MN
WLS1F320MN
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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.