The ABB E211‑16‑20 is a compact 2‑pole ON‑OFF isolator switch designed for low‑voltage electrical control panels and modular DIN‑rail installations. It provides a simple manual switching function to turn circuits or loads ON and OFF, making it suitable for controlling indicators, fans, relays, lighting, and other electrical components in industrial and commercial environments. The device features a slim width that saves panel space and is part of ABB’s E210 series of modular command devices.