The PS4014 is a photo coupled interrupter module containing a GaAs light emitting diode and an NPN silicon photo transistor. Package Dimensions ยข 3.2 (0 0.126) t 6.2 (0.244) t 7.5 (0.295) Package Dimensions in Millimeters (Inches) i 10.0 Min (0.394 Min) l 2.6 (0.102) 83-000564A Pin Connection (.