This family of NPN silicon phototransistors, from Optek Technology Inc., are hermetically sealed devices. They are in standard TO-18 metal can packages which enable high power dissipation and make them suitable for applications in harsh environments.
Features of the OP800WSL, OP801WSL and OP802WSL phototransistors:
TO-18 metal can package
Hermetically sealed
Through-hole mounting
Wide receiving angle
Range of different sensitivities
Operating temperature: -65 to +125 °C