The IR300N-D0 is a GaAlAs infrared LED diode. The device has a peak wavelength of 940nm LED spectrally matched with phototransistor or photodiode. Package Outline Schematic Anode Cathode CT Micro Proprietary & Confidential Page 1 Rev 1 May, 2014 IR300N-D0 3mm Lamp Type 940nm Infrared Emitter.