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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
WLS1F320AU
WLS1F320AU
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2000
WLS1F320AW
WLS1F320AW
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2000
WLS1F320AY
WLS1F320AY
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2000
WLS1F320B
WLS1F320B
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2000
WLS1F320BA
WLS1F320BA
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2000
WLS1F320BB
WLS1F320BB
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Siemens
2000
WLS1F320BC
WLS1F320BC
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2000
WLS1F320BD
WLS1F320BD
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2000
WLS1F320BE
WLS1F320BE
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Siemens
2000
WLS1F320BF
WLS1F320BF
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Siemens
2000
WLS1F320BG
WLS1F320BG
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2000
WLS1F320BH
WLS1F320BH
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Siemens
2000
WLS1F320BJ
WLS1F320BJ
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Siemens
2000
WLS1F320BK
WLS1F320BK
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Siemens
2000
WLS1F320BL
WLS1F320BL
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Siemens
2000
WLS1F320BN
WLS1F320BN
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Siemens
2000
WLS1F320BP
WLS1F320BP
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Siemens
2000
WLS1F320BQ
WLS1F320BQ
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Siemens
2000
WLS1F320BR
WLS1F320BR
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Siemens
2000
WLS1F320BT
WLS1F320BT
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Siemens
2000
WLS1F320BU
WLS1F320BU
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Siemens
2000
WLS1F320BW
WLS1F320BW
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Siemens
2000
WLS1F320BY
WLS1F320BY
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Siemens
2000
WLS1F320C
WLS1F320C
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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.