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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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Manufacturer
Amperage
WLK1F316GK
WLK1F316GK
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Siemens
1600
WLK1F316HK
WLK1F316HK
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Siemens
1600
WLK1F316JK
WLK1F316JK
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Siemens
1600
WLK1F316KK
WLK1F316KK
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Siemens
1600
WLK1F316LK
WLK1F316LK
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Siemens
1600
WLK1F316MK
WLK1F316MK
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Siemens
1600
WLK1F316NK
WLK1F316NK
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Siemens
1600
WLK1F316PK
WLK1F316PK
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Siemens
1600
WLK1F316QK
WLK1F316QK
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Siemens
1600
WLK1F316RK
WLK1F316RK
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Siemens
1600
WLK1F316TK
WLK1F316TK
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Siemens
1600
WLK1F320AK
WLK1F320AK
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Siemens
2000
WLK1F320BK
WLK1F320BK
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Siemens
2000
WLK1F320CK
WLK1F320CK
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Siemens
2000
WLK1F320DK
WLK1F320DK
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Siemens
2000
WLK1F320EK
WLK1F320EK
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Siemens
2000
WLK1F320FK
WLK1F320FK
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Siemens
2000
WLK1F320GK
WLK1F320GK
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Siemens
2000
WLK1F320HK
WLK1F320HK
Limited Stock
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Siemens
2000
WLK1F320JK
WLK1F320JK
Limited Stock
From
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Siemens
2000
WLK1F320KK
WLK1F320KK
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Siemens
2000
WLK1F320LK
WLK1F320LK
Limited Stock
From
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Siemens
2000
WLK1F320MK
WLK1F320MK
Limited Stock
From
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Siemens
2000
WLK1F320NK
WLK1F320NK
Limited Stock
From
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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.