This part is a kind of semiconductor called HLS-4078.

Function of this product has Relay.

Manufacturers : He Li Shun

Image and pinout :

Some of the text within the PDF file :

C US E220153 CQC04001010237 ATS0411191 订购代码 HLS-4078 - H - DC12V ) CONTACT DATA 触点参数： 触点形式 Contact Form Contact Material 触点材料 触点负载 Contact Ratings 最大转换电压 Max Switching Voltage 最大转换电流 Max Switching Current Max Switching Power 最大转换功率 Initial Contact Resistance 接触电阻（首次） Life Expectancy Electrical 电气寿命 Life Expectancy Mechanical 机械寿命 2C Ag+Au 1A 120VAC;2A/24VDC 240VAC/60VDC 2A 120VA/30W 50mΩMax at 6VDC 1A 100,000 Operations(rated load) 10,000,000 Operations(no load) GENERAL DATA 一般参数： Insulation Resistance Dielectric Strength Between Open Contacts Dielectric Strength Between Contacts And Coil Operate Time Release Time Ambient Temperature Shock Resis [ ... ]

HLS-4078 PDF Datasheet Download