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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
WLS1F320NU
WLS1F320NU
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Siemens
2000
WLS1F320NW
WLS1F320NW
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2000
WLS1F320NY
WLS1F320NY
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2000
WLS1F320P
WLS1F320P
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2000
WLS1F320PA
WLS1F320PA
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2000
WLS1F320PB
WLS1F320PB
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Siemens
2000
WLS1F320PD
WLS1F320PD
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2000
WLS1F320PE
WLS1F320PE
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2000
WLS1F320PF
WLS1F320PF
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Siemens
2000
WLS1F320PG
WLS1F320PG
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Siemens
2000
WLS1F320PH
WLS1F320PH
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Siemens
2000
WLS1F320PJ
WLS1F320PJ
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Siemens
2000
WLS1F320PK
WLS1F320PK
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Siemens
2000
WLS1F320PL
WLS1F320PL
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Siemens
2000
WLS1F320PN
WLS1F320PN
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Siemens
2000
WLS1F320PP
WLS1F320PP
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Siemens
2000
WLS1F320PQ
WLS1F320PQ
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Siemens
2000
WLS1F320PR
WLS1F320PR
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Siemens
2000
WLS1F320PT
WLS1F320PT
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Siemens
2000
WLS1F320PU
WLS1F320PU
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Siemens
2000
WLS1F320PW
WLS1F320PW
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Siemens
2000
WLS1F320PY
WLS1F320PY
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Siemens
2000
WLS1F320Q
WLS1F320Q
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Siemens
2000
WLS1F320QA
WLS1F320QA
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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.