SOT-23封装,管脚 K→G→A（C→G→A）.TCA505磁感应式接近开关专用集成电路,末查到代换件.西安电子大楼可以买到的元件.http://cache.baidu.com/c?word=%B3%A1%3B%D0%A7%D3%A6%3B%B9%DC%3B%BD%C5&url=http%3A//www%2Eguangdongdz%2Ecom/5%5F1%2Easp&b=0&a=5&user=baidu
