Optocoupler
An optocoupler, also known as an optoisolator, is an electronic device that provides electrical isolation between two circuits while allowing the transfer of signals or information through an optical channel. It consists of an input section (LED or infrared diode) and an output section (phototransistor, photothyristor, or photodiode) that are optically coupled together within a single package.
Comparison of 4N33 & 4N35
| Feature | 4N33 | 4N35 |
|---|---|---|
| Isolation | Phototransistor | Phototransistor |
| Output Type | NPN | NPN |
| Optocoupler | Phototransistor | Phototransistor |
| Voltage Rating | 30V | 70V |
| Current Rating | 50mA | 50mA |
| Forward Voltage | 1.2V – 1.5V | 1.1V – 1.5V |
| Current Transfer Ratio | 20% – 300% | 100% – 600% |
| Package Type | DIP-6 | DIP-6, SMD-6 |
| Applications | General Purpose | General Purpose |
