Upgrade your electrical system with Siemens Quad Breakers. Each includes four circuit breakers — Q21515CTNC (15/15/15/15A), Q21520CTNC (15/20/20/15A), Q21530CTNC (15/30/30/15A), and Q21540CTNC (15/40/40/15A) — for flexible and reliable power distribution.
