This part is a kind of semiconductor called 109P-1-A-x.
Function of this product has Micro SIL Reed Relays.
Manufacturers : Pickering
Image and pinout :
Some of the text within the PDF file :
SERIES 109 PICKERING SERIES 109 pickering Pickering Electronics Limited Stephenson Road Clacton-on-Sea CO15 4NL England Telephone (UK) 01255 428141 (International) +44 1255 428141 Fax. (UK) 01255 475058 (International) +44 1255 475058 Micro-SIL reed relays Including coaxial types for stacking on 0.15 x 0.6 inches pitch giving SUPERB PACKING DENSITY ® The mu-metal packaged Series 109 and 109RF and the plastic packaged Series 109P and Series 109PH, are magnetically screened single-in-line reed relays that stack on 0.15 inches x 0.6 inches pitch. The adjacent column gives further details of the device types available. These relays require little more than half the board area of the more usual 0.2 x 0.8 inch devices, this allows around 80 percent more relays onto your [ ... ]