It is designed for DC circuits, specifically photovoltaic arrays and marine DC distribution, where isolation and load-break are required per EN/IEC 60947-3.
400 A DC at 1500 V DC is the headline rating — this switch disconnector handles full-load current and isolates the circuit at that voltage. The utilisation categories DC-22A (general DC loads, including motors) and DC-PV2 (photovoltaic string-level isolation) tell you the part is certified for both industrial DC and solar-array duty. The 7.56 kA short-time withstand (Icw) for 1 s and 7.56 kA making capacity (Icm) mean it can survive and close into a fault of that magnitude without welding contacts — important for coordination with upstream fuses or breakers. Rated insulation voltage (Ui) is 1600 V DC, and impulse withstand (Uimp) is 8 kV — so the switch is built for high-voltage DC environments with transient overvoltages common in PV systems. IP40 and IK07 protect against tools and small objects, and low-energy impacts during handling.
Fixed-mount on a backplate; front connections top and bottom. Connection pitch is 45 mm — matches common busbar or cable-lug spacing for 400 A class. Toggle control with a visible contact-position indicator; no visible break window, so the indicator is your isolation confirmation.