Junction boxes prepared for modular switches (18 mm modules) are supplied without switch but with DIN rail already installed. Rated capacity up to 200 A. The disconnection device interrupts the electrical connection if the door is opened. In order to choose the size of the MCB modular circuit breakers, please check the relevant data sheets and carry out the necessary derating calculations, taking into account an overtemperature inside the enclosure of approx. 30°K relative to the ambient temperature and that there is no ventilation inside the enclosure.