The OP593 and OP598 series, from Optek Technology Inc., are a family of NPN silicon phototransistors. They are in dark blue plastic TO-18 equivalent packages. They offer a wide receiving angle in a variety of different sensitivity ranges.
Features of the OP593 and OP598 phototransistors:
Through-hole mounting
TO-18 equivalent package
Dark blue lens
Wide receiving angle
Operating temperature: -40 to +100 °C