Two-pin fireman's switch, switches off DC strings in the PV system using the motor DC load-break switch with motor, 50 A@1000 V DC and 20 A@1500 V DC, 4 pins, rear mounting on DIN rail/with 2 screws, load-break switch + motor unit + status indicator Four DC pins = two inputs/MPPT = two strings. One motor can switch a maximum of ten DC poles = five strings. https://elecena.pl/product/30478887/dx150302muaedsc-fireman-s-switch-dc-load-break-switch-four-pin 2026-07-09 https://elecena.pl/product/30478887/dx150302muaedsc-fireman-s-switch-dc-load-break-switch-four-pin 2026-10-03