This part is a kind of semiconductor called JQC-3FF.

Function of this product has Subminiature High Power Relay.

Manufacturers : Hongfa

Image and pinout :

Some of the text within the PDF file :

JQC-3FF SUBMINIATURE HIGH POWER RELAY File No.:R50034671 Features * Extremely low cost * SPST-NO & SPDT configuration File No.:E133481 * Subminiature, standard PCB layout * Sealed IP67 and Flux proof types available File No.:CQC02001001953 CONTACT DATA Contact Arrangement Initial Contact Resistance Max. Contact Material Contact Rating (Res. Load) Max. switching voltage Max. switching current Max. switching power Mechanical life Electrical life 15A 10A 277VAC 1A 1C 100m (at 1A 6VDC) Silver Alloy 7A 250VDC 10A 277VAC 277VAC/30VDC 10A 2770VA 210W 1 x 107OPS 1 x 10 OPS 5 COIL DATA Nominal Voltage VDC 5 6 9 12 18 24 48 100M ,500VDC 1500VAC, 1min 750VAC, 1min Max. 10ms Max. 5ms Max. 60 98 m/s2(10g) 980 m/s2(100g) 1.5mm, 10 to 55Hz 35% to 85%RH -40 to +85 PCB Approx. 10g Sealed IP67 & Flu [ ... ]

JQC-3FF PDF Datasheet Download