SIRCO M is a range of manually operated modular multipolar load break switches designed for reliable switching and safe isolation in low-voltage electrical systems, particularly for machine control circuits. These switches provide dependable making and breaking of circuits under load conditions while ensuring secure electrical isolation during maintenance. With the addition of compatible accessories, SIRCO M can be configured as a multipolar load break switch or converted into a 3-pole or 4-pole changeover switch. In changeover mode, it enables on-load transfer between two power sources or low-voltage circuits while maintaining safe isolation for enhanced operational reliability.