AFDD fire protection switch according to DIN VDE 0665-10/EN 62606, combined with miniature circuit breaker 1P+N, featuring electronic residual current measurement (300 mA) to enhance fire protection in circuits not protected by RCD. It includes a QuickConnect terminal according to DIN EN 60898-1, VDE 0641-11. The contact protection is according to IP2x DIN VDE 0106 part 100, with a blue test button and AFD trip indicator. It allows for simple individual removal from the phase busbar system and comes with a VDE symbol. It is suitable for retrofitting of additional devices and offers labeling options directly on the device.