The ABB E211‑16‑10 is a compact on‑off (isolator) switch designed for DIN‑rail mounting in electrical control panels and distribution boards. It provides simple manual power or signal switching with a reliable single‑pole, normally‑open contact, making it suitable for ON/OFF functions in lighting, machinery control, signalling circuits, and industrial automation applications. The modular width of just 0.5 units (≈9 mm) allows space‑efficient installation in control cabinets.