This part is a kind of semiconductor called LKS1aF-12V.

Function of this product has power relays.

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

TV-5 rated. High sensitivity: 250mW 1a 5A power relays VDE LK-S LK-S RELAYS RoHS compliant FEATURES 1. High sensitivity A nominal operating power of 250mW and high sensitivity make it ideal for energy saving (LK relay is 530mW). 2. High insulation resistance between contact and coil 1) Creepage distance and clearances between contact and coil: Min. 6 mm .236 inch (In compliance with IEC60065) 2) Surge withstand voltage between contact and coil: 10,000 V 3. Popular terminal pitch in AV equipment field 4. Space-saving slim type Base area: Width 11 × Length 24 mm Width .433 × Length .945 inch 5. Conforms to the various safety standards UL, CSA, VDE, TÜV and SEMKO approved TYPICAL APPLICATIONS • Audio visual equipment • Office equipment • Home appliances ORDERING INFORMATION LK [ ... ]

LKS1aF-12V PDF Datasheet Download