L14G1 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED..
L14G2 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED..
L14G3 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED..
PT204-6B is a high speed and high sensitive NPN silicon phototransistor molded in a standard 3mm package. Due to its black epoxy the device is sensitive. Manufacturer: Everlight.
PT333-3B is a high speed and high sensitive NPN silicon epitaxial planar phototransistor molded in a standard 5 mm package. Due to its Black epoxy the device is sensitive to infrared radiation. Manufacturer: Everlight.