Vishay TSHF Series IR Emitting Diodes. The TSHF series, from Vishay Semiconductors, are through hole Infrared (IR) LEDs in GaAlAs double hetero (DH) technology. They are in a clear, untinted plastic package. Suitable applications include infrared remote control and air data transmission. Peak wavelength: 890nm High reliability High radiant power and intensity Low forward voltage T-1 3/4 (5 mm) form packages Stand-off leads options