A photocoupler, also known as an optocoupler or an optoisolator, is an electronic component or device used to transfer electrical signals or data between two isolated circuits using light as the medium of communication. The primary purpose of a photocoupler is to provide electrical isolation and noise immunity between input and output circuits. This isolation helps protect sensitive components, such as microcontrollers or sensors, from voltage spikes, noise, or potential hazards in the input circuit.
Part Number: FL817
Function: Phototransistor Detector
Package: DIP 4 Pin Type
The FL817 series of devices each consist of an infrared Emitting diodes, optically coupled to a phototransistor detector. They are packaged in a 4-pin DIP package and available in Wide-lead spacing and SMD option.
1. Current transfer ratio : （CTR：50%-600% at IF=5mA,VCE=5V）
2. High isolation voltage between input and output （Viso=5000V rms）
3. Creepage distance＞7.62mm
4. Pb free and ROHS compliant
1. Programmable controllers
2. System appliances,measuring instruments
3. Telecommunication equipments
4. Home appliances,such as fan heaters,etc