The GRAYHILL part 39-351-RED-EW is a round push button switch designed for momentary contact applications. It features a single-pole, single-throw (SPST) configuration with normally open (N.O.) contacts. This switch is rated for a maximum current of 0.5A and a voltage of 220VAC. It is specifically designed for solder lug panel mounting, making it easy to integrate into various electronic devices and control panels. The switch is colored red for visibility and ease of use. With its reliable performance and durable construction, the GRAYHILL part 39-351-RED-EW is an ideal choice for applications requiring high-quality, momentary push button switches.