This part is a kind of semiconductor called TR5V.
Function of this product has Relay.
Manufacturers : TIANBO GANGLIAN ELECTRONICS
Image and pinout :

Some of the text within the PDF file :
TIANBO GANGLIAN ELECTRONICS TR5V TR5V SPECIFICATION FILE NUMBER: T-08KH101A DATE: 2001/11/02 ■ Features www.net Designed for thermostat modem, computer peripherals, video recording and security applications. 1 form A and 1 form C contact arrangement. Low coil power requirement for IC compatibility. Terminals arranged on gird pattern. Designed for compact, high density mounting. ■ CONTACT DATA Contact Contact Contact Form Material Ratings 1C AgNi+Au 2A 120VAC/2A 24VDC 120VAC/60VDC 2A 240VA/48W 100m Ω Max 100,000 10,000,000 at 6VDC 1A Operations(at30Operations/minute) Operations Max Switching Voltage Max Switching Current Max Switching Power Contact Resistance Life Expectancy Electrical Mechanical ■ GENERAL DATA Insulation Resistance Dielectric Strength Between Ope [ ... ]
TR5V PDF Datasheet Download
