The Grayhill part 30-251-BLK is a high-quality, reliable push button switch designed for momentary contact operations. It features a round black button and a maximum current rating of 1A at 220VAC. This switch is normally open (N.O.) and has a single-pole, single-throw (SPST) configuration. With its solder lug terminals, it can be easily mounted on a panel for convenient use. The 30-251-BLK offers a smooth and responsive tactile feel, making it ideal for a variety of applications where momentary contact switches are required.