This part is a kind of semiconductor called 946H-1C-12D.
Function of this product has 946 Series Relay.
Manufacturers : HSIN DA
Image and pinout :

Some of the text within the PDF file :
946 Series Relay FEATURES ● UL safety approval. ● Standard type & High sensitivity type available. ● 2 Amps super miniature relay. ● Conforms to FCC rules & regulation part 68. ● Surge strength: 1500 VAC. ● 1 Form C (SPDT) contact. ● Nominal power 200mW~360mW. ● Operating power 110mW~200mW. ● DIL pitch terminal. ● Washable Type (ultrasonic cleaning is not recommended). UL FILE NO: E162117 CONTACT RATINGS ●Contact Arrangement………………….1 Form C (SPDT) ●Max. Switching Power………………...125VA 60W ●Max. Switching Voltage……………….125VAC 30VDC ●Max. Switching Current………. ……...2A ●Contact Resistance…………………….≤100mΩ ●Rating Load ……………………………1A/125VAC ……………………….. [ ... ]
946H-1C-12D PDF Datasheet Download
