The 4N35 is an optocoupler for general purpose applications. It contains a light emitting diode optically coupled to a phototransistor in 6-pin DIP package.
Manufacturer: Everlight Electronics Co Ltd.

The 4N35 is an optocoupler for general purpose applications. It contains a light emitting diode optically coupled to a phototransistor in 6-pin DIP package.
Manufacturer: Everlight Electronics Co Ltd.

The 4N35 general purpose optocouplers consist of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a 6-pin dual in-line package.
Manufacturer: ON Semiconductor

Standard Single Channel Phototransistor Couplers With Base Connection. The MCT2/ MCTE family is an Industry Standard Single Channel Phototransistor

TCST2103 infrared based optical sensor. It contains an IR emiter and receiver pair mounted facing each other. It can be used with encoders to detect wheel speed, angle, etc.

The MOC3011M is optically isolated triac driver device. This device contain a GaAs infrared emitting diode and a light activated silicon bilateral switch, which functions like a triac. It is designed for interfacing between electronic controls and power triacs to control resistive and inductive loads for 115 VAC (250-400V Peak) operations.

The MOC3020 is an optically Isolated Triac Driver Device, contains a GaAs infrared emitting diode and a light activated silicon bilateral switch, which functions like a triac.

MOC3021 Opto Triac Driver, Opto-isolator, Triac Driver output 400V peak. This is useful in 220V AC application where microcontroller should be isolated from AC main lines.
Manufacturer: Fairchild Semiconductor.

The 4N25 is an optocoupler for general purpose applications. It contains a light emitting diode optically coupled to a phototransistor in 6-pin DIP package.

EL3021 Opto Triac Driver, Opto-isolator, Triac Driver output 400V peak. This is useful in 220V AC application where microcontroller should be isolated from AC main lines.
Manufacturer: Everlight Electronics Co Ltd.

MOC3041 6 Pin DIP Opto isolator triac driver with zero cross circuit. This is useful in 220V AC application where microcontroller should be isolated from AC main lines.

The MOC3083M consist of a GaAs infrared emitting diode optically coupled to a monolithic silicon detector performing the function of a zero voltage crossing bilateral triac driver.
They are designed for use with a discrete power triac in the interface of logic systems to equipment powered from 240 VAC lines, such as solid-state relays, industrial controls, motors, solenoids and consumer appliances, etc.
Brand: Fairchild Semiconductor

The MOC7811 is a infrared based optical sensor. It contains an IR emiter and receiver pair mounted facing each other. It can be used with encoders to detect wheel speed, angle, etc.