The Schneider Electric C254200D1S is a ComPacT NSX200NA DC PV switch disconnector rated for 200 A at 1000 V DC in DC-22A utilisation category. It is a 4-pole, fixed-mount device designed specifically for photovoltaic (solar) arrays, providing a visible-break isolation point between the panel string and the inverter. The DC-22A rating means it is tested for switching mixed resistive and inductive DC loads — typical of the inrush and steady-state current profile from a PV combiner box.
Rated operational voltage is 1000 V DC, and the rated insulation voltage matches at 1000 V DC — this is the system voltage limit for the PV string. The 200 A rating at DC-22A is the maximum operational current under those conditions; the conventional free-air thermal current is 150 A at 65 °C, so in a warm enclosure the switch must be derated or the load kept below 150 A continuous. Short-time withstand current is 2.5 kA for 1 second, and the making capacity alone is also 2.5 kA — the switch can close onto a fault up to that level without welding contacts. The switch is certified for isolation per EN/IEC 60947-3, meaning it provides a guaranteed visible air gap when open — essential for lockout/tagout on PV circuits where residual voltage from the panels can persist. IP40 enclosure protection keeps out tools and wires over 1 mm; it is not washdown-rated but is fine inside a weatherproof cabinet.
Fixed-mount on a backplate; the 4-pole footprint is 140 mm wide by 161 mm high by 86 mm deep. Connection pitch is 35 mm between poles, and both line and load connections are front-accessed — no rear busbar required. The toggle control provides a visible contact-position indicator.