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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
WLL1D316TD
WLL1D316TD
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Siemens
1600
WLL1D316TE
WLL1D316TE
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Siemens
1600
WLL1D316TF
WLL1D316TF
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Siemens
1600
WLL1D316TG
WLL1D316TG
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Siemens
1600
WLL1D316TH
WLL1D316TH
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Siemens
1600
WLL1D316TJ
WLL1D316TJ
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Siemens
1600
WLL1D316TK
WLL1D316TK
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Siemens
1600
WLL1D316TL
WLL1D316TL
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Siemens
1600
WLL1D316TN
WLL1D316TN
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Siemens
1600
WLL1D316TP
WLL1D316TP
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Siemens
1600
WLL1D316TQ
WLL1D316TQ
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Siemens
1600
WLL1D316TR
WLL1D316TR
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Siemens
1600
WLL1D316TT
WLL1D316TT
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Siemens
1600
WLL1D316TU
WLL1D316TU
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Siemens
1600
WLL1D316TW
WLL1D316TW
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Siemens
1600
WLL1D316TY
WLL1D316TY
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Siemens
1600
WLL1D320
WLL1D320
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Siemens
2000
WLL1D320A
WLL1D320A
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Siemens
2000
WLL1D320AA
WLL1D320AA
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Siemens
2000
WLL1D320AB
WLL1D320AB
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Siemens
2000
WLL1D320AC
WLL1D320AC
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Siemens
2000
WLL1D320AD
WLL1D320AD
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Siemens
2000
WLL1D320AE
WLL1D320AE
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Siemens
2000
WLL1D320AF
WLL1D320AF
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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.