4N25 Optocoupler with NPN transitor output

The 4N25 is a 1-channel optical coupler output of the phototransistor with connection to the base. It is made up of infrared gallium arsenide LED and a silicon NPN phototransistor.

An opto-coupled optoisolator or optically coupled isolator is an optically coupled optoisolator, which functions as a switch activated by light emitted by an LED diode that saturates an opto-electronic component, usually in the form of a phototransistor or phototriac. In this way, they are combined into a single semiconductor device, an emitting photo and a receiving photo whose connection between the two is optical. These elements are within an encapsulation that is usually of the DIP type. They are often used to electrically isolate very sensitive devices.

Main features:

• 5000 Vrms Insulation Test Voltage
• Power Supply Regulators
• digital logic inputs
• Faster switching of standard couplers
• Input-output coupling capacity less than or equal to 0.5pF
• Interfaces with all logical families
• Applications: signal processing, power management, communications and network