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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
WLL3F340Z	Limited Stock From Get Price	Siemens	4000
WLL3F340ZA	Limited Stock From Get Price	Siemens	4000
WLL3F340ZB	Limited Stock From Get Price	Siemens	4000
WLL3F340ZC	Limited Stock From Get Price	Siemens	4000
WLL3F340ZD	Limited Stock From Get Price	Siemens	4000
WLL3F340ZE	Limited Stock From Get Price	Siemens	4000
WLL3F340ZF	Limited Stock From Get Price	Siemens	4000
WLL3F340ZH	Limited Stock From Get Price	Siemens	4000
WLL3F340ZJ	Limited Stock From Get Price	Siemens	4000
WLL3F340ZK	Limited Stock From Get Price	Siemens	4000
WLL3F340ZL	Limited Stock From Get Price	Siemens	4000
WLL3F340ZN	Limited Stock From Get Price	Siemens	4000
WLL3F340ZP	Limited Stock From Get Price	Siemens	4000
WLL3F340ZQ	Limited Stock From Get Price	Siemens	4000
WLL3F340ZR	Limited Stock From Get Price	Siemens	4000
WLL3F340ZT	Limited Stock From Get Price	Siemens	4000
WLL3F340ZU	Limited Stock From Get Price	Siemens	4000
WLL3F340ZW	Limited Stock From Get Price	Siemens	4000
WLL3F340ZY	Limited Stock From Get Price	Siemens	4000
WLL3F3501	Limited Stock From Get Price	Siemens	5000
WLL3F3501A	Limited Stock From Get Price	Siemens	5000
WLL3F3501B	Limited Stock From Get Price	Siemens	5000
WLL3F3501C	Limited Stock From Get Price	Siemens	5000
WLL3F3501D	Limited Stock From Get Price	Siemens	5000

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.