Providing a transmissive sensing capability for design engineers, the OPB420 Series from OPTEK, is a slotted infrared optical switch for non-contact interruptive object sensing. The switch includes an infrared LED and phototransistor, allowing for an opaque object to block the light beam from multiple directions, including the X-, Y-, and Z-axes. Suitable applications for the Series include low paper tray sensors, corner sensors, door sensors, tray sensors, printers, copy machines, paper and mail sorting equipment, amusement gaming equipment and medical equipment. The Series switch features an 880 nm wavelength LED with a power dissipation of 100 mW. The input diode’s maximum forward current is 50 mA and maximum forward voltage is 1.7 V (If=20mA). Reverse DC voltage is 2 V, with reverse current of 100µA(Vr=2.0V). Electrical performance of the output phototransistor is characterized at collectoremitter voltages of 24 V and 30 V and power dissipation of 100 mW. Operating temperature range is -40°C to +85°C.