This part is a kind of semiconductor called GH-1A-12L.
Function of this product has Relay.
Manufacturers : GH
Image and pinout :
Some of the text within the PDF file :
GOLDEN RELAYS GH CQC09002028357 19.0×15.6×15.3 E321783 R50158866 Features Superminiature, High power. Low coil power consumption. PC board mounting. Suitable for household appliance, automation system, electronic equipment, instrument and meter, communication facilities and remote control facilities. Contact Data Contact Arrangement 1A, 1B, 1C Contact Material Contact Rating (resistive) Max. Switching Power Max. Switching Voltage Contact Resistance or Voltage drop Operation Electrical life Mechanical Coil Paramet Nil: AgCdO S: AgSnO2 10A/250VAC, 10A/277VAC, 12A/125VAC; TV-5/120VAC 336W 2500VA 110VDC 380VAC Max. Switching Current:12A 50mΩ Max. 105 107 Item 3.12 of IEC255-7 Item 3.30 of IEC255-7 Item 3.31 of IEC255-7 Coil voltage VDC Rated Max. Coilesist [ ... ]