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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
WLS1F320TP
WLS1F320TP
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2000
WLS1F320TQ
WLS1F320TQ
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2000
WLS1F320TR
WLS1F320TR
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2000
WLS1F320TT
WLS1F320TT
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2000
WLS1F320TU
WLS1F320TU
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2000
WLS1F320TW
WLS1F320TW
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2000
WLS1F320TY
WLS1F320TY
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2000
WLS1F320U
WLS1F320U
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WLS1F320UA
WLS1F320UA
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2000
WLS1F320UB
WLS1F320UB
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2000
WLS1F320UD
WLS1F320UD
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2000
WLS1F320UE
WLS1F320UE
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2000
WLS1F320UF
WLS1F320UF
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2000
WLS1F320UG
WLS1F320UG
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2000
WLS1F320UH
WLS1F320UH
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2000
WLS1F320UJ
WLS1F320UJ
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2000
WLS1F320UK
WLS1F320UK
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2000
WLS1F320UL
WLS1F320UL
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Siemens
2000
WLS1F320UN
WLS1F320UN
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Siemens
2000
WLS1F320UP
WLS1F320UP
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Siemens
2000
WLS1F320UQ
WLS1F320UQ
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Siemens
2000
WLS1F320UR
WLS1F320UR
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Siemens
2000
WLS1F320UT
WLS1F320UT
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Siemens
2000
WLS1F320UU
WLS1F320UU
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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.