The C104100D1S is a Schneider Electric ComPacT NSX100NA DC PV switch disconnector — a 4-pole, fixed-mount unit rated 100 A at 1000 V DC under DC-22A utilisation category. It's purpose-built for photovoltaic arrays, providing a manual disconnect point between the panel string and the inverter or combiner box. The toggle handle gives a clear visual and tactile position indication, and the contact position indicator confirms the state without needing to open the enclosure. Rated for isolation per EN/IEC 60947-3, so it meets the code requirement for a load-break disconnect in DC circuits up to 1000 V. The 8 kV impulse withstand voltage (Uimp) and pollution degree 3 rating mean it handles the transient environment typical of outdoor PV installations without creeping or flashover.
The headline number is 100 A at 1000 V DC in DC-22A duty. DC-22A covers switching of resistive and mixed resistive-inductive loads — exactly what a PV string inverter input sees: the panel current plus the input capacitance inrush. Short-circuit performance: 2.5 kA short-time withstand (Icw) for 1 second, and the same 2.5 kA making capacity (Icm) when the switch-disconnector operates alone. That tells you the device can close onto a fault of that magnitude — important for coordination with upstream fuses or breakers in the array combiner. Electrical durability is 1500 cycles at full rated voltage and current; mechanical durability is 10,000 cycles. For a manual disconnect that sees maybe one or two operations per week, that's a lifetime. But if you're cycling it daily for testing or maintenance, plan for replacement sooner.
Fixed mounting on a backplate — no DIN rail adapter here. IP40 enclosure protection keeps out tools and fingers but not water spray — mount it inside a weatherproof cabinet for outdoor PV use. IK07 impact resistance handles incidental tool drops during installation.