This push switch by Delock is ideal for installation in control panels, for example in industry, control or regulation technology. Push buttons can also be found in the automotive industry or the consumer sector. For example, as doorbells or triggers for lighting systems with timers such as those found in hallways. Switch Unlike a button, a switch remains in its position after being actuated. Examples of switches are toggle switches, rotary switches or slide switches. The light switch is probably the best-known example. Opener and closer The NO (closer) contact establishes a connection between two contacts, while the NC (opener) contact releases them. Technical details