View sir-341st3f datasheet:

Sensors Infrared light emitting diode, top view type SIR-341ST3F The SIR-341ST3F is a GaAs infrared light emitting diode housed in clear plastic. This device has a high luminous efficien- cy and a 940 mm peak wavelength suitable for silicon detectors. It is small and at the same time has a wide radiation angle, making it ideal for compact optical control equipment. FApplications FExternal dimensions (Units: mm) Optical control equipment Light source for remote control devices FFeatures 1) Compact (?3.1 mm). 2) High efficiency, high output PO = 8.4 mW (IF = 50 mA). 3) Wide radiation angie ?1 / 2 = ±16deg. 4) Peak wavelength well suited to silicon detectors (?P = 940 nm). 5) Good current-optical output linearity. 6) Long life, high reliability. 7) Low cost, clear epoxy resi