This part is a kind of semiconductor called 4N38.
Function of this product has OPTICALLY COUPLED ISOLATOR PHOTOTRANSISTOR OUTPUT.
Manufacturers : ISOCOM COMPONENTS
Image and pinout :

Some of the text within the PDF file :
4N38X, 4N38AX 4N38, 4N38A OPTICALLY COUPLED ISOLATOR PHOTOTRANSISTOR OUTPUT z APPROVALS UL recognised, File No. E91231 Package Code " GG " 2.54 7.0 6.0 1.2 7.62 6.62 Dimensions in mm 1 2 3 6 5 4 'X' SPECIFICATIONAPPROVALS z VDE 0884 in 3 available lead form : - STD - G form z - SMD approved to CECC 00802 Certified to EN60950 by :Nemko - Certificate No. P01102464 3.0 7.62 4.0 3.0 0.5 13° Max 0.26 0.5 3.35 DESCRIPTION The 4N38, 4N38A series of optically coupled isolators consist of infrared light emitting diode and NPN silicon photo transistor in a standard 6 pin dual in line plastic package. FEATURES z Options :10mm lead spread - add G after part no. Surface mount - add SM after part no. Tape&reel - add SMT&R after part no. z High BVCEO (80V min) z High Is [ ... ]
4N38 PDF Datasheet Download
