Kingbright kp 2012f3c smd infrared led 2 x 1 25mm kingbright kp 2012f3c a surface mounting 2 0 x 1 25mm infrared led that is just 1 1mm thick the device is made with f3 gallium arsenide dice and is mechanically and spectrally matched for use with phototransistors kingbright kp 2012f3c kp 2012f3c infrared emitting diode