Vishay TSAL Series IR Emitting Diodes. Vishay Semiconductors' TSAL family consists of through-hole Infrared (IR) emitting diodes. They are available in 3mm (T-1) or 5mm (T-1 3/4) packages. These high power IREDs offer a high radiant power with high radiant intensity. Suitable applications for the TSAL family includes; IR remote control units, free air transmission systems, IR sources for smoke detectors and IR sources for optical counters and card readers.. Features of the TSAL IR emitters: Through-hole plastic packages T-1 (3mm) and T-1 3/4 (5mm) packages High reliability High radiant power High radiant intensity Low forward voltage High speed Variety of peak wavelengths Range of beam angles