The C634630DS is a ComPacT NSX630NA DC switch disconnector, 4 poles, fixed-mount, rated 630 A in DC-22A duty at 750 V DC. That DC-22A utilisation category means it's built for switching mixed resistive and inductive DC loads — think DC motor circuits or battery-bank distribution — not just a straight resistive break. Suitability for isolation per EN/IEC 60947-3 is confirmed, so it doubles as a visible-disconnect point in the panel. The IP40 enclosure keeps tools and fingers out but isn't washdown-rated — mount it inside a cabinet.
Fixed-mount on a backplate, front connections both top and bottom. The 45 mm pole pitch matches the ComPacT NSX DC family footprint — same drilling template as other 4-pole units in the range. Mechanical durability is 5000 cycles; electrical durability is 1000 cycles at full rated current and voltage, so it's a disconnect for occasional switching, not a daily-duty contactor.