Optoi Srl

Phototransistors

Phototransistors

Phototransistors are semiconductor devices that amplify the current generated by the photovoltaic effect using junctions; these optical components offer similar performance to the photodiode but are much more sensitive to light. Specifically, a phototransistor is a semiconductor device that can detect light levels and alter the current flow between the emitter and collector according to the amount of light received.

What are phototransistors used for, and what are their applications?

Phototransistors are used in a wide variety of fields, including robotics through rotary and linear encoders used on cobots.Phototransistor arrays are used in rotary and linear encoders, optical barriers, presence sensors, and optical and X-ray sorting machines.Our phototransistor arrays are available in SMD plastic or ceramic, Metal TO, and Chip-On-Board (COB) packages.