Infrared phototransistors shrink in size

Now available in a 1206 case size, TT electronics OPTEK Technology’s new series of NPN silicon transistors are designed for infrared detection in sensing applications. The new miniaturized surface-mount OP520/OP521 series devices tout fast response times of 15 microseconds for machine automation, miniature optical encoders and other high-speed, non-contact position sensing systems.