BUY S1NB20 https://www.utsource.net/itm/p/1705914.html
General Purpose Rectifiers(200V 1A)
S1NB20 is a 4-pin DIP (dual in-line package) switch manufactured by Shindeng. It is a single-pole, single-throw (SPST) switch with a normally open contact. It is a momentary switch, meaning that it will only remain in the closed position while the button is being pressed. The S1NB20 switch is typically used in applications such as audio equipment, home appliances, and other electronic devices. It can be used to control the power supply of a device, as well as to provide a reset function. It is also suitable for use in low-voltage, low-current circuits. (For reference only)