The Grayhill part 30-1 is a high-quality push button switch designed for various applications. This switch features a momentary contact design, making it ideal for applications that require a temporary connection. It has a normally open (N.O.) single-pole, single-throw (SPST) configuration, providing a reliable and convenient solution for controlling circuits. The round button design adds a sleek touch to any panel or device, while the solder lug terminals ensure secure and permanent connections. With a maximum rating of 1A and 220VAC, this switch is able to handle a wide range of electrical loads. Its panel mount design makes it easy to install and integrate into your project. Overall, the Grayhill part 30-1 push button switch offers both reliability and versatility, making it a popular choice among engineers and hobbyists.