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Insulated Case Circuit Breaker

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Insulated Case Circuit Breaker

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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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Part Number	PRICE	Manufacturer	Amperage
WLL3D340WJ	Limited Stock From Get Price	Siemens	4000
WLL3D340WK	Limited Stock From Get Price	Siemens	4000
WLL3D340WL	Limited Stock From Get Price	Siemens	4000
WLL3D340WN	Limited Stock From Get Price	Siemens	4000
WLL3D340WP	Limited Stock From Get Price	Siemens	4000
WLL3D340WQ	Limited Stock From Get Price	Siemens	4000
WLL3D340WR	Limited Stock From Get Price	Siemens	4000
WLL3D340WT	Limited Stock From Get Price	Siemens	4000
WLL3D340WU	Limited Stock From Get Price	Siemens	4000
WLL3D340WW	Limited Stock From Get Price	Siemens	4000
WLL3D340WY	Limited Stock From Get Price	Siemens	4000
WLL3D340Y	Limited Stock From Get Price	Siemens	4000
WLL3D340YA	Limited Stock From Get Price	Siemens	4000
WLL3D340YB	Limited Stock From Get Price	Siemens	4000
WLL3D340YC	Limited Stock From Get Price	Siemens	4000
WLL3D340YD	Limited Stock From Get Price	Siemens	4000
WLL3D340YE	Limited Stock From Get Price	Siemens	4000
WLL3D340YF	Limited Stock From Get Price	Siemens	4000
WLL3D340YG	Limited Stock From Get Price	Siemens	4000
WLL3D340YH	Limited Stock From Get Price	Siemens	4000
WLL3D340YJ	Limited Stock From Get Price	Siemens	4000
WLL3D340YK	Limited Stock From Get Price	Siemens	4000
WLL3D340YL	Limited Stock From Get Price	Siemens	4000
WLL3D340YN	Limited Stock From Get Price	Siemens	4000

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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.