RC unit, 3-pole, type A, selective, In: 63 A, 300 mA, Un AC: 400 V

RC unit for 5SY, 3-pole, type A, selective, In: 63 A, 300 mA, Un AC: 400 V The RCD is the residual current device for touch protection. https://www.siemens.com/global/en/home/products/energy/low-voltage/components/sentron-protection-devices/residual-current-protective-devices.html. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe and efficient electrical infrastructure in buildings and industry.