.
PC-17L1 - Photocoupler(These Photocouplers consist of a Gallium Arsenide Infrared Emitting)
PC-17K1 - Photocoupler(These Photocouplers consist of a Gallium Arsenide Infrared Emitting)
K101 - Photocoupler(These Photocouplers consist of a Gallium Arsenide Infrared Emitting)