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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
WLS1F320MP
WLS1F320MP
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2000
WLS1F320MQ
WLS1F320MQ
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2000
WLS1F320MR
WLS1F320MR
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2000
WLS1F320MT
WLS1F320MT
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2000
WLS1F320MU
WLS1F320MU
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2000
WLS1F320MW
WLS1F320MW
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2000
WLS1F320MY
WLS1F320MY
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2000
WLS1F320N
WLS1F320N
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WLS1F320NA
WLS1F320NA
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2000
WLS1F320NB
WLS1F320NB
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2000
WLS1F320NC
WLS1F320NC
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2000
WLS1F320ND
WLS1F320ND
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2000
WLS1F320NE
WLS1F320NE
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2000
WLS1F320NF
WLS1F320NF
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2000
WLS1F320NG
WLS1F320NG
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2000
WLS1F320NH
WLS1F320NH
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2000
WLS1F320NJ
WLS1F320NJ
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2000
WLS1F320NK
WLS1F320NK
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Siemens
2000
WLS1F320NL
WLS1F320NL
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Siemens
2000
WLS1F320NN
WLS1F320NN
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Siemens
2000
WLS1F320NP
WLS1F320NP
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Siemens
2000
WLS1F320NQ
WLS1F320NQ
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2000
WLS1F320NR
WLS1F320NR
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Siemens
2000
WLS1F320NT
WLS1F320NT
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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.