This part is a kind of semiconductor called PS2501-1.
Function of this product has (PS2501-x) HIGH DENSITY MOUNTING PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS.
Manufacturers : ISOCOM COMPONENTS
Image and pinout :
Some of the text within the PDF file :
PS2501-1X, PS2501-2X, PS2501-4X PS2501-1, PS2501-2, PS2501-4 HIGH DENSITY MOUNTING PHOTOTRANSISTOR OPTICALLY COUPLED ISOLATORS APPROVALS l UL recognised, File No. E91231 'X' SPECIFICATION APPROVALS l VDE 0884 in 3 available lead form : - STD - G form - SMD approved to CECC 00802 l Certified to EN60950 by the following Test Bodies :Nemko - Certificate No. P01102465 Fimko - Certificate No. FI18162 Semko - Reference No. 0202041/01-25 Demko - Certificate No. 311161-01 l BSI approved - Certificate No. 8001 DESCRIPTION The PS2501-1,PS2501-2,PS2501-4 series of optically coupled isolators consist of infrared light emitting diodes and NPN silicon photo transistors in space efficient dual in line plastic packages. PS2501-1X PS2501-1 2.54 7.0 6.0 Dimensions in mm 1.2 5.08 4 [ ... ]