The 4N39, 4N40 are optically coupled isolators consisting of a Gallium Arsenide infrared emitting diode and a light activated silicon controlled rectifier (SCR) mounted in a standard 6-pin dual-in-line package.
● Photo - SCR Output
● 660 V Isolation
● 400 V Peak Forward Voltage
● Low cost dual-in-line package
● U.L. Approved (file No. 91231)