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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
WLS1F320JA
WLS1F320JA
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Siemens
2000
WLS1F320JB
WLS1F320JB
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Siemens
2000
WLS1F320JC
WLS1F320JC
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Siemens
2000
WLS1F320JD
WLS1F320JD
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Siemens
2000
WLS1F320JE
WLS1F320JE
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Siemens
2000
WLS1F320JF
WLS1F320JF
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Siemens
2000
WLS1F320JG
WLS1F320JG
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2000
WLS1F320JH
WLS1F320JH
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2000
WLS1F320JJ
WLS1F320JJ
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Siemens
2000
WLS1F320JK
WLS1F320JK
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Siemens
2000
WLS1F320JL
WLS1F320JL
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Siemens
2000
WLS1F320JN
WLS1F320JN
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Siemens
2000
WLS1F320JP
WLS1F320JP
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Siemens
2000
WLS1F320JQ
WLS1F320JQ
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Siemens
2000
WLS1F320JR
WLS1F320JR
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Siemens
2000
WLS1F320JT
WLS1F320JT
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Siemens
2000
WLS1F320JU
WLS1F320JU
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Siemens
2000
WLS1F320JW
WLS1F320JW
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Siemens
2000
WLS1F320JY
WLS1F320JY
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Siemens
2000
WLS1F320K
WLS1F320K
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Siemens
2000
WLS1F320KA
WLS1F320KA
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Siemens
2000
WLS1F320KB
WLS1F320KB
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Siemens
2000
WLS1F320KC
WLS1F320KC
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Siemens
2000
WLS1F320KD
WLS1F320KD
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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.