BUY SG-531PC4MC https://www.utsource.net/itm/p/9773386.html

Description: SG-531PC4MC is a 4-pin DIP (dual in-line package) EPCSO (electrically programmable conductive surface switch) device. Features: Low power consumption High-speed switching High-density mounting High-reliability Low-cost High-temperature operation Applications: Automotive Industrial Telecommunications Consumer electronics Medical (For reference only)