The 4N39 and 4N40 have a gallium-arsenide infrared emitting diode optically coupled with a light activated silicon controlled rectifier in a dual in-line package.
| Part Number | Manufacturer | Description |
|---|---|---|
| 4N48TX | TT Electronics | Hi-Reliability Optically Coupled Isolator |
| 4N47A | TT Electronics | Hi-Reliability Optically Coupled Isolator |
| 4N49 | TT Electronics | Hi-Reliability Optically Coupled Isolator |
| 4N45 | HP | High Gain Darlington Output Optocouplers |
| 4N45 | Avago Technologies | High Gain Darlington Output Optocouplers |
| EP1S-4N4 | NEC | LOW SOUND PRESSURE |
| EP1S-4N4T | NEC | LOW SOUND PRESSURE |
| EP1S-4N4TT | NEC | LOW SOUND PRESSURE |
| EP2-4N4S | NEC | Twin relay for motor and solenoid reversible control |
| EP2-4N4ST | NEC | Twin relay for motor and solenoid reversible control |
