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TT Electronics - Optek Technology


TT Electronics OPB620 Slotted Optical Switch

The OPB610 and OPB620 slotted optical switches consist of an infrared emitting diode and an NPN silicon phototransistor with an enhanced low current roll-off to improve contrast ratio and immunity to background irradiance.

Slotted optical switches are also known as opto switches or optical switches (however not the optical component). Including a photoemitter and a photodetector mounted in a single package, these switches provide status indications when light beams are interrupted in various types of instruments, systems and equipment.

  • Non-contact switching
  • Printed circuit board mounting
  • Enhanced signal to noise ratio
  • PIN photodiode sensor for high speed (OPB611, OPB621)
  • Lead centers: 0.275: (OPB61_) / 0.320” (OPB62_)
  • Non-contact reflective object sensor
  • Assembly line automation
  • Machine automation
  • Machine safety
  • End of travel sensor
  • Door sensor


Housings are made of low cost Infrared opaque plastic to minimize ambient light radiation interference.